Across:
8 Swinger's warning (warning on golf course = 'fore' = F-ORE) about old city (-UR-) (FURORE) commotion (FURORE),
9 Legend (‘leG’ end = G-) gets nothing from tennis (-LOVE- score), from fight in the ring (-BOX in the boxing ring) (GLOVEBOX) or from one of the handy types in golf? (handy type in VW Golf car = GLOVEBOX),
10 Hounds (DOGS) those arrested by Boris Godunov (those arrested by ‘boriS GODunov’ = sgod), on reflection (= reverse indicator) (sgod = DOGS),
11 Your setter (dog) might not want to share this (DOG BISCUIT), as it’s a snack for one of those in 10 across (snack for one of the ‘dogs’ = DOG BISCUIT),
12 Brie coming out of Gobi Desert (‘Brie’ coming out of ‘Gobi Desert’ = godset = STODGE) is lumpy in an indigestible way (STODGE),
14 Evidence of deposits (BANK BOOK) on one side of The Liffey (BANK) associated with Dubliners? (James Joyce’s Dubliners = BOOK) (BANK BOOK),
15 Change of heart on social media (change of heart on Facebook = unlike = UN-LIKE) about one who is not a sore loser (-SPORTSMAN- is not a sore loser) (UNSPORTSMANLIKE) is not fair (UNSPORTSMANLIKE),
18 Popular (IN-) time (-T-) to be cheeky (-RUDE-) at school (-S) (INTRUDES) as local muscles in (local ‘muscles in’ = INTRUDES),
20 Danish (Danish PASTRY) extremes of pastoral poetry (extremes of ‘PAStoral poeTRY’ = PASTRY),
22 Guess (ASSUMPTION) feast day? (ASSUMPTION),
24 Daring (BOLD) characters up (= reverse indicator) in Seanad lobbying (characters in ‘seanaD LOBbying’ = dlob = BOLD),
25 Community (EC-) associated with the foreign (‘the’ foreign/French = -LE-) court (-CT-) in charge (in charge = -IC) (ECLECTIC) of type dealing with a range of sources (ECLECTIC),
26 Most (t) of the bias (slant) (‘slant’ without ‘t’ = -SLAN-) in papers (ID papers = I-D) (ISLAND) in Cuba, for example (ISLAND).
Down:
1 At the start of the game, leave the pavilion (RUN OUT for the game) to dismiss a nightwatchman? (dismiss a nightwatchman/batsman in cricket = RUN OUT),
2 Snaky types (BOAS) of bard from Barbados (‘bard’ from ‘Barbados’ = baos = BOAS),
3 Local drugs to blow your mind perhaps (HEAD GEAR) from Panama (Panama hat = HEADGEAR),
4 Swallowed up (= reverse indicator) by Gallinago gallinago (‘swallowed up by ‘gallinaGO GAllinago’ = goga = AGOG) waiting with bated breath (AGOG),
5 Drug (POT-) is always charged (-ION) (POTION) to one in the pharmacy (POTION),
6 Those getting kicked out of The Sands perhaps (BEACH BALLS) with a (-A-) church (-CH) graduate (BA-) taken in by church ringers (bells = BE- -LLS) (BEACH BALLS),
7 Pop (= anagram indicator) Idol’s (idols = SOLID) three (three) on the radio (= homophone indicator) (‘three’ = ‘tree’ = OAK) (SOLID OAK) producing a favourite of The Carpenters (SOLID OAK),
13 Readers put (readers put) out (= anagram indicator) (readers put = DEPARTURES) by those opposing arrivals (DEPARTURES),
14 Vehicles (BUSES) for undesirables shunning Ireland (‘undesirables’ shunning ‘Ireland’ = uesbs = BUSES),
16 Single (-ONE-) by star (sun), cut (n) (‘sun’ without ‘n’ = -SU-) in concert hall (National Concert Hall = NCH = N-CH) (NONESUCH) in the old days, is perfect (archaic for perfect/excellent = NONESUCH),
17 One may have to have it out in The Theatre (APPENDIX) or in a book (APPENDIX),
19 Number Two (DEPUTY) record (extended-play record = -EP-) included in The Mission? (duty = D-UTY) (DEPUTY),
21 Do a U-turn (RELENT) as apes jump out of plane trees (‘apes’ jump out of ‘plane trees’ = lntree = RELENT),
23 Banks of Interlaken (banks of ‘InterlakeN’ = IN-), Switzerland (-CH) (INCH), move slowly (INCH),
24 By all means, get rid of yes-man (‘by all means’ get rid of ‘yes-man’ = ball = BALL) from The Globe (BALL).