Across:
8 Copy that (CARBON copy/paper) ale from Barcelona? (‘ale’ from ‘Barcelona’ = barcon = CARBON),
9 Party (DO-) follower (-MINION) (DOMINION) gets the upper hand (DOMINION),
10 Soft option to ignore points (‘soft option’ to ignore ‘points’ = ofto = FOOT) produced by one of those down at heel (FOOT),
11 Native’s leg (native’s leg = EVANGELIST) broken (= anagram indicator) on the missions (EVANGELIST),
12 Pictures (PRINTS) of sprint (sprint = PRINTS) runner (= anagram indicator),
14 Throughout our existence (OVER TIME) this is all we get for working longer (OVERTIME),
15 The Greens are always going on about this trail (CARBON FOOTPRINT) in 8 across (‘carbon’ = CARBON), 10 across (‘foot’ = FOOT-) and most of 12 across (most of ‘prints’ = -PRINT) (CARBON FOOTPRINT),
18 Talk (DIALOGUE) the talk? (DIALOGUE),
20 Permits (ALLOWS) for building (= anagram indicator) walls (walls = ALL-WS) around Ring (-O-) (ALLOWS),
22 One with a habit (SISTER-) joins American gangster (-HOOD) (SISTERHOOD) in community of women (SISTERHOOD),
24 Boring (DULL) serfs leave in full dress (‘serfs’ leave in ‘full dress’ = ulld = DULL),
25 Playing (= anagram indicator) record? It (record it = DIRECTOR) calls the shots for the other players! (DIRECTOR),
26 Repulsive (ODIOUS) party (do = OD-) reviews (= reversal indicator) debts (IOUs = -IOUS) (ODIOUS).
Down:
1 Prefer (FAVOUR) four (F-OUR) over a (-A-) five? (-V-) (FAVOUR),
2 Knocked back (= reversal indicator) sample from Chianti bottle (sample from ‘Chianti bottle’ = ti bo = OBIT) in passing – this is the life (OBIT),
3 Popular (IN) Mediterranean (SEA-) relative (-SON) (IN SEASON) is available now (IN SEASON),
4 The concept (IDEA) of some outside agency (some ‘outside agency’ = ide a = IDEA),
5 Political exile (ÉMIGRÉ) offering regime (regime = ÉMIGRÉ) change (= anagram indicator),
6 All in a true (all in a true = UNILATERAL) novel (= anagram indicator) produced by one person (UNILATERAL),
7 The Centaur (HORSEMAN) from Mount (mount = HORSE-) Mainalo initially (‘Mainalo’ initially = M-) and Nauplion summits (‘and Nauplion’ summits = -AN) (HORSEMAN),
13 Groups of people in the higher classes (NOBILITIES) with one Tbilisi (one Tbilisi = NOBILITIES) revolutionary (= anagram indicator),
14 It’s the wizard’s place (OZ-) to lose the head (t) on pitch (‘tone’ = -ONE) (OZONE) – and that can be toxic in the upper echelons (OZONE),
16 Last of the data (last of the ‘data’ = A-) conceals the dirt (bin = -B IN) in the interests of leaders (‘in the interests of’ leaders = ITIO) (AB INITIO) in Latin countries to begin with (AB INITIO),
17 Pearl (TEARDROP) knocks over (= reversal indicator) wine (port = T-ROP) covering a red (a red = -EARD-) dress (= anagram indicator) (TEARDROP)
19 Move in circles (GYRATE) with heartless (heartless/without centre = ‘u’) man (‘guy’ without ‘u’= GY-) and judge (-RATE) (GYRATE),
21 Digs up (= reversal indicator) most of the lawn (most of the ‘lawn’ = law = WAL-) for crazy (-NUT) (WALNUT) source of oil (WALNUT),
23 Part of backlog repudiated (part of ‘backlog repudiated’ = og re = OGRE) by pantomime villain (OGRE),
24 No objections in job description (no ‘objections’ in ‘job description’ = drip = DRIP) – is that what the plumber found? (DRIP).