Across:
8 Pressure (P-) on a (-A-) supply chain (store) is endless (e) (‘store’ without ‘e’ = -STOR) (PASTOR) from The Minister (PASTOR),
9 Lawyer (attorney general = AG) retires (= reversal indicator) (AG = GA-) with Chuck (= anagram indicator) Norris (Norris = -RRISON) (GARRISON) for company (company/troops = GARRISON),
10 Wealthy (RICH) section of Maastricht (section of “Maastricht” = RICH),
11 Odd (= anagram indicator) thing (thing = NIGHT) to convey (SHIFT) (NIGHT SHIFT) to those workers who spend their days in bed (NIGHT SHIFT),
12 Roman (Roman = NORMA-) drunk (= anagram indicator) third pint (third ‘pint’ = -N) (NORMAN) of Strongbow, for example (Strongbow, led the NORMAN invasion of Ireland),
14 Persistence (TENACITY) of Yeti can’t (Yeti can’t = TENACITY) work (= anagram indicator),
15 Heard slightly different (= homophone indicator) Gangsta (‘gangsta’ = ‘gangster’ = -ALCapone) Rap (MUSIC) after (= position indicator) event (INCIDENT-) (INCIDENTAL MUSIC) adds to the atmosphere on film (INCIDENTAL MUSIC),
18 Detective’s (DIs = DIS-) work out (-SOLVE) (DISSOLVE) and wind down (DISSOLVE),
20 A follower (‘a’ follower = B-) from one (-I-) religious faction (-SECT) (BISECT) in Split (split = BISECT),
22 Party (Fianna Fáil = -FF-) after (= positional indicator) last game (last ‘game’ = E-) at year end (‘year’ end = -R-) with Tyrone (Tyrone = -ONTERY) playing (= anagram indicator) (EFFRONTERY) with impudence (EFFRONTERY),
24 Passion flower vine on the borders (‘passion flower vine’ on the borders = PANE) clearly needs to be looked through (PANE of glass),
25 They are capable of wiping the floor (CLEANERS) with those who know how much DIRT needs to be collected (CLEANERS),
26 Bands (SASHES) in school (S-) generally look like they’ve been fired up (-ASHES) (SASHES).
Down:
1 Chocolatier dismisses other (‘chocolatier’ dismisses ‘other’ = coclai = CALICO) whitish type of material (CALICO),
2 Leave a lasting impression (ETCH) with ink from kitchen (‘ink’ from ‘kitchen’ = tche = ETCH),
3 Gets fired (artillery = ORDNANCE) by those in Arsenal (arsenal/collection of weapons = ORDNANCE),
4 Enthusiastic (AGOG) to geographically ignore Caerphilly (‘geographically’ ignore ‘Caerphilly’ = goga = AGOG),
5 Bronte (Bronte = BRETON) novel (= anagram indicator), not in English, in manner of speaking (BRETON),
6 Evening (NIGHT-) suit (suit in cards = -CLUBS) (NIGHTCLUBS) designed for dancers (NIGHTCLUBS),
7 The Paper covering the match (CONFETTI) is thrown by those United supporters? (CONFETTI),
13 Established (MAINSTREAM) Maine (‘Maine’ = ‘main’ = MAIN-) State (= homophone indicator) close to small river (-STREAM) (MAINSTREAM),
14 There is no cash in Athletics (there is no ‘cash’ in ‘athletics’ = tleti = TITLE) Championship (TITLE),
16 Not the first (‘not’ the first = N-) to trouble (-AIL) record (FILE) (NAIL FILE) as anyone with cutting edge stuff will have one (NAIL FILE),
17 Bill’s pusher (pushing a legislative bill = LOBBYIST) in reception area (LOBBY-) is (-IS-) trouble from the start (‘trouble’ from the start = -T) (LOBBYIST),
19 Hang on? (LINGER) This is fishy (LING-) to one of those in hospital! (-ER) (LINGER),
21 Transport (CONVEY) firm (CO-) from American city (New York = -N-Y) overlooks a fair amount of (half of) outlet (vent) (half of ‘vent’ = -VE-) (CONVEY),
23 Releases Aerosmith sample (‘releases Aerosmith’ = esae) backtrack (= reversal indicator) (esae = EASE) of The Life of Riley (life of EASE),
24 Opts (opts = POST) out (= anagram indicator) of appointment (POST).