Across:
1 Veteran (OLD CAMPAIGNER) told heading off (‘told’ heading off = OLD) to gain (gain = -AIGN-) ground (= anagram indicator) in scout’s vehicle (camper = CAMP-ER) (OLD CAMPAIGNER),
10 Son lies (son lies = LIONESS) awfully (= anagram indicator) to one with pride (LIONESS),
11 Clever type (KNOW-ALL) of king (K-) is not in favour of referendum (-NO-) – it divides the room! (wall = -W-ALL) (KNOW-ALL),
12 Garner from Roof Garden (‘garner’ from ‘roof garden’ = oofd = FOOD) produces all you need to sustain oneself (FOOD),
13 Partners (WIVES) with suspect = (anagram indicator) views (views = WIVES),
15 Turns up (= reversal indicator), no parking (p) in April (‘April’ without ‘p’= aril = LIRA) in old European capital (old capital/money = LIRA),
17 Flighty type (TIT songbird) consumed by attitude, whatever way you look at it (consumed by attitude, whatever way you look at it : ‘attitude’ = TIT),
19 It’s about (RE-) one of the Turners (-TINA Turner) (RETINA) the ophthalmologist has his eye on perhaps (RETINA),
21 Some Tennessean celebrity (some ‘Tennessean celebrity’ = sean ce = SEANCE) sits at a table calling for spirits (SEANCE),
22 Volume (EDITION) is an issue? (EDITION),
23 Found fault with (NAGGED) college head (dean) retiring (= reversal indicator) (dean = NA-ED) over heartless (a) joke (‘gag’ without ‘a’= -GG-) (NAGGED),
25 A few (a few = WAF-E) out (= anagram indicator) around Florida (-FL-) (WAFFLE) for breakfast (WAFFLE),
27 Down in the dumps (SAD) over (= reversal indicator) most of the (h) run (‘dash’ without ‘h = das = SAD),
29 Carol (SING) is (is) upset (= reversal indicator) (is = SI-) getting a poor grade (no grade = -NG) (SING),
30 Stories (TALES) of the last of the draught (last of the ‘draught’ = T-) beers (-ALES) (TALES),
31 One in the eye (IRIS) for those in the Bari Risorgimento (for those in the “Bari Risorgimento” = i Ris = IRIS),
34 It’s great (G-) for that woman (-HER-) and family (-KIN) (GHERKIN) in a bit of a pickle (GHERKIN),
35 Battle-weary screen (screen to protect besieged troops in ancient Rome = TESTUDO) offering The Roman Tortoise? (Latin ‘tortoise’ = TESTUDO),
36 Dated (OLD) 13 across (‘wives’ = WIVES) and 30 across (‘tales’ = TALES) (OLD WIVES’ TALES) with superstitious beliefs (OLD WIVES’ TALES).
Down:
2 Local to keep sketch (locally/colloquially ‘keep sketch’ = LOOKOUT) of watchtower (LOOKOUT),
3 Omen from newcomer (‘omen’ from ‘newcomer’ = ewcr = CREW) in the boat (CREW),
4 Duff (golf ‘duff’ = MISHIT) is (-IS-) head of humanities (head of ‘humanities’ = -H-) in American University (M-IT) (MISHIT),
5 One of those from The Hill (ant = AN-T) holds back (= reversal indicator) Moose (Moose = elk = -KLE-) (ANKLET) with chain on the foot (ANKLET),
6 Stare out of stage door (‘stare’ out of ‘stage door’ = gdoo = GOOD) for dandy! (dandy/great! = GOOD),
7 Joy (ELATION) gets into ale (into ale = ELATION) brewing (= anagram indicator),
8 Ancient (OLD) individuals (ones = ONE’S) in hunt (forage = FOR AGE) (OLD FOR ONE’S AGE) showing talent beyond years (OLD FOR ONE’S AGE),
9 Supports those no longer working (OLD-AGE PENSION) for gaoled (gaoled = OLD-AGE) criminal (= anagram indicator) at Parisian boarding house (PENSION) (OLD-AGE PENSION),
14 Midwives’ (mid ‘wives’ = V-) curious (= anagram indicator) ritual (ritual = -IRTUAL) (VIRTUAL) is, in reality, very “PC”! (VIRTUAL reality on PC/personal computer),
16 One of the joints (KNEE -) left (-L) (KNEEL) to church movement (KNEEL),
18 Nepal (Nepal) cook (= anagram indicator) (Nepal = PENAL) from one of the colonies (PENAL colony),
20 Throw in (ADD) sample of bread dough (sample of ‘bread dough’ = ad d = ADD),
21 Put in the ground work (SOW) for some who miss home (‘some who’ miss ‘home’ = sow = SOW),
24 Eton College sacks cool (‘Eton College’ sacks/without ‘cool’ = etnlege = GENTEEL) sort that’s overly polite (GENTEEL),
26 Keep (FORT-) a foreign (a = -UN-) Oriental (east = -E) (FORTUNE) mint (FORTUNE),
27 Assembled (SAT) half the Navajo (half the ‘Navajo’ = NAV) (SAT NAV) to give directions for road trip (SAT NAV),
28 Headstone doesn’t include one (‘headstone’ doesn’t include ‘one’ = headst = DEATHS) of a number of fatalities (DEATHS),
32 Stitch up (S-EW) over the weekend (‘week’ end = -K-) (SKEW) to distort the facts (SKEW),
33 Haitians drop hint (‘Haitians’ drop ‘hint’ = aias = ASIA) it’s the biggest Mass on the globe! (biggest land mass = ASIA).