Across:
8 It’s a strange bird (weird/strange = CUCKOO = bird) who only makes an appearance at certain times (CUCKOO in a cuckoo clock),
9 It’s fundamental (INHERENT) to the inner (the inner = INHERENT) set (= anagram indicator),
10 Louis I of Naples leads (‘Louis I of Naples’ leads = LION) one of those with pride (LION),
11 Associate (-MEMBER-) in Rush (rush = RE-ED) (REMMEMBERED) is not forgotten (REMEMBERED),
12 Had the bit between one’s teeth (CHEWED) as revolutionary (CHE-) got married (-WED) (CHEWED),
14 Dare me to (dare me to = MODERATE) run (= anagram indicator) in middle of the road? (MODERATE),
15 Go from Billy to Jack in desperation (GET THE RUNAROUND) to do the deal for small car (GET THE RUNAROUND),
18 Reproaches (UPBRAIDS) president (-P-) getting to twist a number of yarns (-BRAID-) in America (U-S) (UPBRAIDS),
20 Got rid of (TOSSED) politician (TD = T-D) over losing the head (p) with sheriff’s men (‘posse’ without ‘p’ =-OSSE-) (TOSSED),
22 It’s the power of moving (LOCOMOTION) crazy, local (LOCO-) proposal (-MOTION) (LOCOMOTION),
24 Some revolutionary (= reversal indicator) lower class (some ‘lower class’ = wer c = CREW) of ship’s company (CREW),
25 Writer (PEN-) gets stuck into what the chef is providing (-KNIFE) (PENKNIFE) for the scout’s knapsack (PENKNIFE),
26 Peer’s (peers = EQUALS) question (-Q-) for Unionist leader (‘Unionist’ leader = -U-) in sale (sale = E-ALS) scheme (= anagram indicator) (EQUALS).
Down:
1 Popular (in) backing (= reversal indicator) (in = -NI-) in Press (press = PU-SH) (PUNISH) to teach someone a lesson (PUNISH),
2 Is this the type of cover we all have (SKIN) for leap out of ski-plane? (‘leap’ out of ‘ski-plane’ = SKIN),
3 Endless (t) wine (‘port’ without ‘t’ = POR-) from narrow range of hills (-RIDGE) (PORRIDGE) is best consumed early in the day (PORRIDGE),
4 Company (FIRM) of Irishmen (Irish ‘men’ = FIR-) starting manoeuvres (starting ‘manoeuvres’ = -M) (FIRM),
5 Like some amusement parks (THEMED) in Rialto rejected by Maître d’hôtel (‘Rialto’ rejected by ‘Maître d’hôtel’ = mtedhe = THEMED),
6 Roger’s Omen (Rogers Omen = GREENROOMS) adapted (= anagram indicator) in a number of theatres for the actors not currently working on stage (GREENROOMS),
7 Engineer (-E-) consumed by butane (butane = UNB-ATE-) explosion (= anagram indicator) is not the first (‘not’ the first = -N) (UNBEATEN) to not have found a match (UNBEATEN),
13 Had lunch (-ATE-) from open range (open ‘range’ = -R-) with women (-W-) in factory (works = W-ORKS) (WATERWORKS) – who is supplying the Adam’s Ale? (WATERWORKS supplying “Adam’s Ale’ = water),
14 Savages (MAULS) area (-A-) in tenement housing (slum) going all the way back (= reversal indicator) (slum = M-ULS) (MAULS),
16 Checked out (EXPLORED) to take a trip around (EXPLORE-) Germany (-D) (EXPLORED),
17 Took in the meeting (ATTENDED) of escort (ATTEND-) and writer (-ED) (ATTENDED),
19 Creationist has no taste (‘creationist’ has no ‘taste’ = crioni = IRONIC) for what’s sarcastic (IRONIC),
21 Evidently dismisses DIT (‘evidently’ dismisses ‘DIT’ = evenly = EVENLY) in a balanced way (EVENLY),
23 Covers the bun (ICES the bun) with a slice of Red Leicester (a slice of ‘Red Leicester’ = ICES),
24 Women left unwelcome (‘women’ left ‘unwelcome’ = uelc = CLUE) hint (CLUE).