Across:
8 Tip off (p) Pat (‘Pat’ without ‘p’ = AT-), Spike (spike/nail = -TACK) (ATTACK) and Sally (sally/raid = ATTACK),
9 Hooligan (TEARAWAY) from Split (split/rip = TEAR-) is on holiday (-AWAY) (TEARAWAY),
10 Probabilities (ODDS) and downside to releasing wine (‘downside’ to releasing ‘wine’ = dosd = ODDS),
11 Fruit (LEMON-), drugs (-GRASS) (LEMONGRASS) or herb (LEMONGRASS),
12 On reflection (= reversal indicator), is able (can = -NAC) to go (go = -OG-) to clubs (C-) (COGNAC) drunk in France (COGNAC),
14 An activity for swingers (golf = GOL-F-) around Dublin (-D-) is (-IS-) getting housing leader (‘housing’ leader = -H) (GOLDFISH) to carp (carp = complain & carp fish family = GOLDFISH),
15 Broke (STRAPPED FOR CASH) with 25 across (‘strapped’ = STRAPPED) supporting (supporting = FOR) 24 down (‘cash’ = CASH) (STRAPPED FOR CASH),
18 Sporting lady paid out (“sporting lady” without “paid” = sortngly = STRONGLY) solidly (STRONGLY),
20 Leases (leases = EASELS) out (= anagram indicator) to those supporting the Liffey Swim and others (those supporting Jack B Yeats’ The Liffey Swim and others = EASELS),
22 When guns are put to your head (ULTIMATUMS), the final choices are a no-brainer (ULTIMATUMS),
24 Group (group/wing = CAMP) cut initially (‘cut’ initially = C-) from Band Aid (-AMP) (CAMP),
25 Nepal is out of salt and pepper (‘Nepal’ is out of ‘salt and pepper’ = stadpper = STRAPPED) and short on dough (short on dough/cash = STRAPPED),
26 Wasn’t there (ABSENT) for fresh (= anagram indicator) beans (beans = ABSEN-) on toast for starter (‘toast’ for starter = -T) (ABSENT).
Down:
1 Where one might want to create a picture (STUDIO) of the drawing room (STUDIO),
2 By no means lose money (‘by no means’ lose/without ‘money’ = bans = BANS) in bars (BANS),
3 Sounds like (= homophone indicator) somewhere in West Cork (‘Schull’ = ‘skull’ = SKULL-) and Cork (cork/lid = - CAP) (SKULLCAP) for one of the family associated with The Mint (SKULLCAP is from the mint herb family),
4 It’s on the agenda (ITEM) to take the peas out of meat pies (take the ‘peas’ out of ‘meat pies’= meti = ITEM),
5 Grass (DARNEL rye grass) near (near = -ARNE-) mill (= anagram indicator) in Donegal (D-L) (DARNEL),
6 Like lambs to the slaughter (SACRIFICES), face crisis (face crisis = SACRIFICES) in a blur (= anagram indicator),
7 Bishop (B-) does someone a service (-ASSISTS) (BASSISTS) with musicians (BASSISTS),
13 Etonian pal (Etonian pal = NEAPOLITAN) producing (= anagram indicator) ice cream in Italy (NEAPOLITAN ice cream),
14 Archaeological site (dig = GID-) set up (= reversal indicator) on top of dock (top of ‘dock’ = -D-) yard (-Y) (GIDDY) is staggering in an excitable way (GIDDY),
16 All there is (TOTALITY) to little one (TOT-) travelling (= anagram indicator) Italy (Italy = -ALITY) (TOTALITY),
17 Hang around too long (OVERSTAY) for new (= anagram indicator) voters (voters = OVERST-) initially lacking (s) opinion (‘say’ without ‘s’ = -AY) (OVERSTAY),
19 Foreign spirit (GRAPPA) doctor (G-P-) outside Knock (knock = -RAP-) is anonymous (-A) (GRAPPA),
21 Twists at the bar (LEMONS) with fresh (= anagram indicator) melons (melons = LEMONS),
23 Resent leaving Undertones (‘resent’ leaving ‘undertones’ = undo = UNDO) or Free (UNDO),
24 It’s cold (C-) in the forest (-ASH) (CASH) for the bucks in America (CASH).