Across:
8 It’s a measure of the material (unit of weight of material/nylon = DENIER) produced by Peter, for one, refuting the truth (St Peter denied he knew Jesus = DENIER),
9 Mix up (SCRAMBLE) Marcel’s (Marcel’s) production (= anagram indicator) (Marcel’s = SCRAM-LE) about a follower (‘a’ follower = -B-) (SCRAMBLE),
10 Sparkling wine (CAVA) and Calvados sold out (‘Calvados’ ‘sold’ out = cava = CAVA),
11 Trips (COACH TOURS) mentor (COACH) from 24 down (‘tour’ = TOUR-) at school (-S) (COACH TOURS),
12 Item (COUPLE) lost (-L-) in stylish automobile (coupé = COUP-E) (COUPLE),
14 CID knows (CID knows) criminal (= anagram indicator) (CID knows = WINDSOCK) measures the strength of the blow at the airport (WINDSOCK),
15 Architect (DESIGNER) stalks (stalks/straw = STUBBLE) (DESIGNER STUBBLE) one of those trendy types who could do with a shave (DESIGNER STUBBLE),
18 Drunk (= anagram indicator) Pilsner (Pilsner = SPRIN-LE) over weekend (‘weeK’ end = -K-) (SPRINKLE) with a dash (SPRINKLE),
20 Joy’s (joys = DREAMS) nightmares! (DREAMS),
22 In a short time (in a short time/ soon = SO- -ON) gets to grips with paper (Financial Times = -FT-) getting to choose (-OPT-) one (-I-) (SOFT OPTION) easy way out (SOFT OPTION),
24 Old revolutionary (TONE) buried up (= reverse indicator) in the cenotaph (buried up in the ‘cENOTaph’ = enot = TONE),
25 Take stock again of (REINVEST) retweet (RT = R-T) about a German (‘a’ German = -EIN-) victory (-V-) at point-to-point (point-to-point = East-South = -ES) (REINVEST),
26 Attention seeking publicity (STUNTS) for hampers (hampers/hinders = STUNTS).
Down:
1 Characters video-taped a lobster (characters ‘video-taPED A LObster’ = PEDALO) from pleasure boat (PEDALO),
2 Flaky mineral (MICA) found in ceramic art (found in ‘ceraMIC Art’ = MICA),
3 On the wagon (DRY) and drug free (CLEAN) (DRY CLEAN) – what’s to launder? (DRY CLEAN),
4 One of those from Georgia (Asian), Trim (n) (‘Asian’ without ‘n’ = ASIA) and one side of the Urals (ASIA),
5 Any (any) word, in a manner of speaking (= homophone indicator) (‘any’ = ‘Annie’ = ORPHAN) from Oliver? (Oliver = ORPHAN),
6 Not worth considering (IMPOSSIBLE) one (I-) Frenchman (Monsieur = -M-) has potential (potential = -POSSIBLE) (IMPOSSIBLE),
7 Charlie (C-) produces a couple of lines (LL = -L-L) about Heather (heather erica = -ERICA-) (CLERICAL) that relates to the office (CLERICAL),
13 Old man from Middle East (PHILISTINE) gets hip (hip) replacement (= anagram indicator) (hip = PHI-) – the first (1st = -IST-) in a long queue (line = -L-INE) (PHILISTINE),
14 It’s not getting any better (WORSE) for idlers from World Series (‘idlers’ from ‘World Series’ = wores = WORSE),
16 Bossy type (EMPLOYER) makes work for others (EMPLOYER),
17 Desist in (desist in) creating (= anagram indicator) (desist in = TIDINESS) order (TIDINESS),
19 Captain (skipper) loses head (s) (‘skipper’ without ‘s’ = KIPPER) with swimmer who is likely to be cured (KIPPER),
21 Not much time (MINUTE) for Asti Spumante dishing out pastas (‘Asti Spumante’ dishing out ‘pastas’ = iumnte = MINUTE),
23 The small bit (IOTA) concealed by The Patriot Act (concealed by ‘the patrIOT Act’ = IOTA),
24 Curator has no car (‘curator’ has no ‘car’ = utor = TOUR) for the sightseeing (TOUR).