Across:
1 In a slavish way, Liberia originally (Liberia originally founded as a land for the settlement of freed slaves = LAND OF THE FREE) produced country music (anthem) for all of us (us = US National Anthem = LAND OF THE FREE),
10 Really old (ANCIENT) worker (ant = AN-T) outside transport company (Córas Iompair Éireann = -CIE-) mid-morning (mid letter of ‘morNing’ = -N-) (ANCIENT),
11 Plucky types (PLECTRA) opened Pinot (opened ‘Pinot’ = P-) and fantastic (= anagram indicator) claret (claret = -LECTRA) (PLECTRA),
12 Included in formulae developed (included in ‘formuLAE Developed’ = laed) setting up (= reversal indicator) (laed = DEAL) work in the drugs trade (DEAL),
13 Opus from South Pole (‘opus’ from ‘South Pole’ = thole = HELOT) produced between a slave and a citizen? (HELOT is between a slave and a citizen),
15 Starting for all sides today (LAND is on all sides of today’s grid) producing touchdown? (touch down = LAND),
17 Some abandon a programme (some ‘abandoN A Programme’ = NAP) for the rest of the afternoon (NAP),
19 Old Saracens travelling away (NOMADS in the Arabian desert) to Wanderers – not the ones you’d associate with 30 across? (Saracens + Wanderers – not the ones you’d associate with ‘rugby’ = NOMADS),
21 Fact (fact) generated (= anagram indicator) (fact = CAFT-) by article (-AN) (CAFTAN) goes over the head of the hippy (CAFTAN),
22 Coaches from another era (horse-drawn coaches/carriages = LANDAUS) in Australia (-AU) opening (= positional indicator) 15 across (‘land’ = LAND-) at school (-S) (LANDAUS),
23 Busy (HECTIC) architect gets rid of art (‘architect’ gets rid of ‘art’ = chiect = HECTIC),
25 Songbird (THRUSH) in wild (= anagram indicator) hurts (hurts = THRUS-) top of head (top of ‘Head’ = -H) (THRUSH),
27 Long-haired type with a beard (wildebeest / GNU) produced part of magnum opus (part of ‘maGNUm opus’ = GNU),
29 Peter – out (STOP) of loaves from Sevastopol (‘loaves’ from ‘Sevastopol’ = stop = STOP),
30 Primarily, governance (primarily ‘Governance’ = -G-) set in stone (ruby = RU-BY) (RUGBY) for sport (RUGBY),
31 Commuters failing to get Metro (‘commuters’ failing to get ‘Metro’ = cmus = SCUM) for film (film = SCUM),
34 Organisation (UN-) tested partner (-TRIED and tested) (UNTRIED) lacking experience (UNTRIED),
35 A (A-) part of an unfinished (l) recording of singer (vocal) (‘vocal’ without ‘l’ = -VOCA-) at party (-DO) (AVOCADO) produced by a green type that’s stoned (AVOCADO),
36 Area (LAND-) on popular (-IN-) side of Grafton (side of ‘Grafton’ = -G) Street (ST-) to rent (rent/tear = -RIP-) with endless (end ‘lesS’ = -S) (LANDING STRIPS) spaces awaiting new arrivals (LANDING STRIPS).
Down:
2 Praise (ACCLAIM) for a couple of colleges (C+C = -CC-) in Alabama (AL = A-L-) getting the point of the exercise (-AIM) (ACCLAIM),
3 Created a sketch (DREW) that’s weird (weird) without single (i) (‘weird’ without ‘i’ = werd) backtrack (= reverse indicator) (werd = DREW),
4 Make stout (FATTEN) for a (-A-) teetotaller (-TT-) in bog (fen = F-EN)? (FATTEN),
5 Joint (HIP-) with local dance (-HOP) (HIP-HOP) music (HIP-HOP),
6 Hereafter lose heart (‘hereafter’ lose ‘heart’ = refe = FREE) with time on one’s hands (FREE),
7 Sporting (= anagram indicator) natter (natter = ENTRA-T) about new (-N-) (ENTRANT) competitor (ENTRANT),
8 Find oneself up the creek (LAND IN THE SOUP) for encounter between a rock and a hard place (LAND IN THE SOUP),
9 What travel agents to the stars (NASA) set out to do in the 1960s (LAND ON THE MOON) in Montes Alpes, for instance? (Montes Alpes mountain range on the moon / LAND ON THE MOON),
14 One of those in The Upper House (LANDING), in 15 across (‘land’ = LAND-) and in (-IN-) Government? (-G) (LANDING),
16 German newspaper (Bild = -D LIB) answered leader (‘Answered’ leader = A-) twisting everything (= reverse all indicator) (AD LIB) that’s said off the cuff (AD LIB),
18 Tree (-ASH-) found in Pennsylvania (PA = P-A) (PASHA) by character with roots to Ottoman Empire (PASHA),
20 Snatch the odd (‘SnAtCh’ the odd letters = SAC) small pouch (SAC),
21 A piece of meat (CUT) to share (CUT),
24 Square (-T- square) in Cairo (Cairo) built (= anagram indicator) (Cairo = CROA-I-) with aid initially (‘Aid’ initially = -A) (CROATIA) from country in the European Union (CROATIA),
26 To get free (UNCLASP) – stop hugging, for instance (UNCLASP),
27 Drag (lug) back (= reverse indicator) (lug = GUL-) to study (-DEN) (GULDEN) in Dutch capital – the alternative one (Dutch capital = GULDEN or alternative spelling = ‘guilder’),
28 Snake (-BOA-) discovered in Utah (U-T-) on top of sump (top of/first letter of ‘Sump’ = -S-) (U-BOATS) by those formerly in the sink business? (U-BOATS),
32 State (= homophone indicator) penalised (‘fined’ = ‘find’ = FIND) for what was discovered in archaeological dig? (FIND),
33 Raised floor on both sides (‘RAised floOR’ on both sides = raor) back (= reverse indicator) (raor = ROAR) in The Boom (ROAR).