Three clues 1ac, 1dn and especially 2dn, held me up for some minutes before I completed the crossword.
Across
1 CHOP-SUEY – CHOP (cut into pieces), SUEY, rev. of YE (the old), US (American)
5 CARPET – P (packed initially) in CARET (anag. of CRATE)
10 OTTER – deleting R from ROTTER (scoundrel)
11 POKER DICE – POKER (card game), D (daughter leading), ICE (diamonds)
12 CHOLERA – CHOLER – hom. of ‘collar’ (catch), A (a)
13 MINSTER – deleting the second instance of I in MINISTER (clergyman)
14 ARTS AND CRAFTS – anag of SCAN DRAFT STAR
18 FROM THE WORD GO – Two def
20 SIDEARM – anag of ADMIRES
22 PIONEER – I (one), ON in PEER (nobleman)
24 ALICE BAND – ALICE (girl), BAND (group)
25 FRUMP – F (prime piece of fillet), RUMP (steak)
26 ELEVEN – EL (the Spanish), EVEN (square)
27 ONE-LINER – ON (about), E (Eastern), LINER (ship)
Down
1 CHOICE – deleting C (literally the central letter, also an abbr. for centre) from choC-ice
2 OUT FOR A GOOD TIME – I had ‘… FOR A GOOD TIME’ from the crossings (had to look up what that w word meant, though!) and I put in OUT only after I got T from 10ac.
3 SERGE – two definitions
4 ESPLANADE – ESPLAN (anag of Naples), AD (notice), E (close to landing-stagE).
6 AARON’S ROD – Two definitions – As I knew the title of D.H. Lawrence’s novel, I solved this. Subsequently, on looking up the word ‘mullein’ in Chambers, I learnt that that plant is known also as Aaron’s rod.
7 POINT OF NO RETURN – anag. of FLIGHT UP FRONT R(Russia’s capital)
8 THEORISE – THEO (Lt. Kojak, movie character), RISE (to be promoted) – I solved it from def and the latter part of wordplay. Later I did an Internet search to understand the earlier part.
9 SKIM – S (second), Kim (Kipling novel)
15 TETE-A-TETE – actually TÊTE-À-TÊTE – A (first of all) in TETE, TETE (two Parisian heads, tête being the French term for ‘head’) – accent marks are ignored in fill-ins and these letters don’t affect crossings which may not have accent marks
17 DROPPED IN – DROPPED (left), I (one), N (noon)
19 PROPER – PRO (in favour of), PE (exercises), R (runs)
21 OFFAL – OFF (spoilt), A(a), L (lake)
For those of us who watched Kojak on a Saturday night in the 70s, 8 down was a great clue.