Across:
8 Caught (-C-) between teetotallers (A-A-) responsible for spying (-CIA) (ACACIA) from the garden centre (ACACIA)
9 Came back again and again (RE-ECHOED) for original (= anagram indicator) decree (decree = RE-EC-ED) about what’s very popular (hot) for the most part (t) (‘hot’ without ‘t’ = -HO-) (RE-ECHOED),
10 Took advantage of (USED) content for disingenuous editors (content for ‘disingenuous editors’ = USED),
11 With both feet on the ground (STABLE), happy (glad) to head off (g) (‘glad’ without ‘g’ = -LAD-) with the last of the brides (the last of the ‘brides’ = -S) (STABLE LADS) and grooms (STABLE LADS),
12 Drunk (= anagram indicator) US port (US port = SPROUT) and Bud (bud/shoot = SPROUT),
14 Risky option (LONG SHOT) offered by barman perhaps (LONG SHOT),
15 Hornet (hornet = NORTHE-) upset (= anagram indicator) nurse (registered nurse = -RN) at home belonging to us (IRELAND) (NORTHERN IRELAND) in Ulster (NORTHERN IRELAND),
18 Save hide (save hide = ADHESIVE) disposing (= anagram indicator) of something sticky (ADHESIVE),
20 Have a go (TRY-) for most of (bout) the fight (b) (‘bout’ without ‘b’ = - OUT) (TRY-OUT) audition (TRY-OUT),
22 Can never believe this type (UNFAITHFUL) is considered a cheat (UNFAITHFUL),
24 Completes the following transfer to club unique (completes/last letters of ‘transfer to club unique’ = ROBE) to The Cape (cape = ROBE),
25 Ali ranks (Ali ranks = SRI LANKA) Yank (yank = anagram indicator) from island (SRI LANKA),
26 Distinguished scientist (SAVANT) designed (= anagram indicator) Sat Nav (sat nav = SAVANT).
Down:
1 Carries on (carries on/misbehaves = ACTS UP) with plays (ACTS) and leads under pressure (leads ‘under pressure’ = UP) (ACTS UP),
2 Extract of Balzac ideology (extract of ‘Balzac ideology’ = ACID) can be corrosive (ACID)
3 Lawsuit (CAS-E) covers what the group performed (-SET-) on first track (first ‘track’ = -T-) (CASSETTE) for audiotape (CASSETTE),
4 Seismic zone, for instance (AREA), of some similar earthquake (some ‘similar earthquake’ = AREA),
5 Second class (B-) liner (liner = -ERLIN) travelling (= anagram indicator) (BERLIN) to European city (BERLIN),
6 Nativity, for example (Nativity play = CHILD’S PLAY) – how easy can that be? (CHILD’S PLAY),
7 It’s the only option for the man upstairs dealing with Old Nick (SEND DOWN) from lock-up? (lock up in prison = SEND DOWN),
13 Noel (Noel = ON -LE) Rock (= anagram indicator) admits The (THE) Bill (bill = TAB-) (ON THE TABLE) is up for discussion (ON THE TABLE),
14 Left (L-) organisation (-UN-) retiring (= reversal indicator), for example (e.g. = -GE), (LUNGE) in spring (LUNGE),
16 Nothing extraordinary about (ORDINARY) old (O-) road (-RD-) to institute (-I-) that ran (ran = -NAR-) up (= reversal indicator) by yard (-Y) (ORDINARY),
17 Merciless type (RUTHLESS) of criminal (= anagram indicator) hustlers (hustlers = RUTHLESS),
19 Make a plan (INTEND) with bank’s interim dividend (banks ‘interim dividend’ = INTEND),
21 Cosmopolitan (URBANE) describes city (URBAN-) energy (-E) (URBANE),
23 Phobia (FEAR) of some still-life artists (some ‘still-life artists’ = FEAR),
24 In part, consider a venture (in part, ‘consider a venture’ = RAVE) that appeals to dancers (RAVE).