Across:
1 Family doctor dismisses mortal (‘family doctor’ dismisses ‘mortal’ = fiydco = CODIFY) type of catalogue (CODIFY),
4 Government (G-) enquires (enquires/asks = -AS-KS) about revolting (= reversal indicator) squabble (row = -WOR-) (GASWORKS) with energy producer (GASWORKS),
9 Advertisement (POSTER) for spectators missing Cats (‘spectators’ missing ‘cats’ = petors = POSTER),
10 Honorary title presented to one of those retiring (EMERITUS) from One Direction (east = E-) at benefit (-MERIT-) for Americans (-US) (EMERITUS),
12 Have contact with (TOUCH-) court (-WOO-) judge at the centre (“judge” at the centre = -D) (TOUCHWOOD) of Tinder – that will ignite things (tinder/flammable wood = TOUCHWOOD),
13 Drunken spree (BINGE) celebrating without claret (‘celebrating’ without ‘claret’ = ebing = BINGE),
14 Matching frocks (WEDDING GOWNS) for union event (WEDDING) and for beauty pageants (GOWNS) (WEDDING GOWNS),
18 Wrote (“wrote” = “rote” = LEARN BY HEART) for the audience (= homophone indicator) –don’t forget that! (LEARN BY HEART),
21 Cited (cited = EDICT) novel (= anagram indicator) produced by the Roman father (EDICT),
22 Unaltered (unaltered = UNRELATED) adaptation (= anagram indicator) has nothing to do with The Family (UNRELATED),
24 Describes the next generation (EXPECTED) of forthcoming issues (issues/children = EXPECTED),
25 Is (is = SI-) setting up (= reversal indicator) train (= anagram indicator) set (set = -EST-) from midday (mid ‘day’ = -A) (SIESTA) for the rest of the afternoon in Madrid (SIESTA),
26 Catalogue (L-IST) includes old (-O-) place (lay = YAL-) set up (= reversal indicator) (LOYALIST) by faithful follower (LOYALIST),
27 Right (R-) to leave (leave = -EVEAL) criminal (= anagram indicator) (REVEAL) show (REVEAL).
Down:
1 Cork (CAP-), English (-E) part of Dublin, for instance (Dublin TOWN) (CAPE TOWN), and port city in Africa (CAPE TOWN),
2 Discourage (DISSUADE) bundle (= anagram indicator) used as ID (used as ID = DISSUADE),
3 Butcher’s (= anagram indicator) shelf (shelf = FLESH) for the meat (FLESH),
5 The bank job (ARMED ROBBEREY) – dream (dream = ARMED) move (= anagram indicator) that could be a rip off? (ROBBERY) (ARMED ROBBERY),
6 Labour (WORK-) court judges (-BENCH) (WORKBENCH) getting a hammering from chippy sorts here (WORKBENCH),
7 Most of the fish (most of the ‘tuna’ = -TUN-) in bar (rod = RO-D) (ROTUND) with stout (ROTUND),
8 Understands the true story (SUSSES) of abstruseness without the banter (‘abstruseness’ without the ‘banter’ = susess = SUSSES),
11 Time consuming (LONG) for leaders of Tour risking openly (leaders of ‘tour risking openly’ = TRO-) (LONG TROUSERS) taking drugs (-USERS) covering both legs (LONG TROUSERS),
15 There’s no difference (IDENTICAL) whatever way you look at it, it’s just more of the same (IDENTICAL),
16 Best data (best data = BAD TASTE) produced (= anagram indicator) by one of those sick types, in a manner of speaking (BAD TASTE),
17 Delay (stall = ST- -ALL) leaders undermining Democratic Whip (leaders ‘undermining Democratic Whip’ = -UD W-) inside (STUD WALL) – it’ll divide The House (STUD WALL),
19 Sketch again (RETELL) unnatural (= anagram indicator) tree (tree = RETE-) lines (-LL) (RETELL),
20 = BIOPS-) with unknown quantity (-Y) (BIOPSY) of a sample that needs to be examined (BIOPSY),
23 Some of the hoi polloi responsible (some of the ‘hoi polloi responsible’ = LOIRE) for one of the great flowers of France (flowers/rivers / LOIRE).