Across:
1 Gamey replacement (SUB-) for old city (-UR-) bishop (-B-) (SUBURB) found in 25 across, for example (“Rialto” is a SUBURB),
4 Players (-ACTORS) almost (y) score (‘try’ without ‘y’ = TR-) from the start (= positional indicator) (TRACTORS), breaking new ground across the turf (TRACTORS),
9 Take cab from log cabins (take ‘cab’ from ‘log cabins’ = logins = LOSING) giving someone the slip (LOSING),
10 Beluga (Beluga = BLUE -AG) swimming (= anagram indicator) around Florida (FL-) (BLUE FLAG) – it’s a sign of a clean beach (BLUE FLAG),
12 One of the revelations (STATEMENT) of New (= anagram indicator) Testament (testament = STATEMENT),
13 Creatives don’t get visa (‘creatives’ don’t get ‘visa’ = crete = CRETE) for Mediterranean island (CRETE),
14 Essence (EAU DE COLOGNE), found in Spain (E-), French department (French department = Aude = -AU DE-), and in Germany (COLOGNE) (EAU DE COLOGNE),
18 Obsessive (TRAINSPOTTER) type of coach (TRAIN-) is keeping an eye on things (-SPOTTER) (TRAINSPOTTER),
21 Pressure (-P-) to get into lime (lime = IM-EL) dress (= anagram indicator) (IMPEL) for drive (IMPEL),
22 A Romanist (a romanist = ANIMATORS) novel (= anagram indicator) produced by those working for Disney (ANIMATORS),
24 It was taken from the first chap (first chap/Adam gave SPARE RIB to Eve) with extra (SPARE) small, open boat (RIB) (SPARE RIB),
25 Old foreign market (RIALTO is the old mercantile quarter of Venice) in Dublin? (RIALTO),
26 Time (-T-) in the latter half of the day (EVEN-ING) (EVENTING) for the horsey set (EVENTING),
27 Imprudent to drop REM (‘imprudent’ to drop ‘REM’ = ipudnt = PUNDIT) for one of the Talking Heads (PUNDIT).
Down:
1 Traders (SALESMEN) provide small (S-) drinks (-ALES-) for the workers (-MEN) (SALESMEN),
2 Make a big effort (BUST A GUT) to laugh wholeheartedly (BUST A GUT),
3 Class (RANGE) of Orangeman ignoring moan (‘Orangeman’ ignoring ‘moan’ = rgean = RANGE),
5 Family member (RELATION-) to post (-SHIP) (RELATIONSHIP) bond (RELATIONSHIP),
6 One of those increasingly loud types (CRESCENDO) gets credit (CR-) for making (= anagram indicator) scene (scene = -ESCEN-) at party (-DO) (CRESCENDO),
7 Mole in (mole in = OILMEN) trouble (= anagram indicator) with crude types (OILMEN),
8 Put one’s mark to (SIGNED) trip out of the springtide (‘trip’ out of the ‘springtide’ = sngide = SIGNED),
11 Faith (DENOMINATION) in money (DENOMINATION),
15 Rent lemon (rent lemon = ENROLMENT) complex? (= anagram indicator) That’s some admission! (ENROLMENT),
16 Took time walking (STROLLED) from port to port (port = left side = L to L = -LL-) in busy (= anagram indicator) Dorset (Dorset = STRO-ED) (STROLLED),
17 Take issue with (CROSS) what’s in bloom (OUT) (CROSS OUT) and remove (CROSS OUT),
19 Car (model T-) instalment (instalment/edition = -ISSUE) (TISSUE) in The Paper (TISSUE paper),
20 New (= anagram indicator) patio (patio = OPIAT-) on front entrance (front ‘entrance’ = -E) (OPIATE) is synonymous with drug dealing (OPIATE),
23 Farewell (ADIEU) to colourful type (“dye” = “die” = -DIE-) on the radio (= homophone indicator) in Australia (A-U) (ADIEU).