1: Wielding stolen ice pick (9)
2: Very young cat I lost in an ancient city (7)
3: Dispatched boxing champ--outstanding (7)
4: Neither's partner participated in an orchestra (3)
5: Hesper's fresh fields (7)
6: French song composed by German boy in study (7)
7: Mediterranean leaves unfashionable coins? (3)
8: Oriental talc dispenser deserves acclaim (5)
12: Nightwear and jersey top added in afterthought (3)
13: Carries most of sea-bird back. (3)
16: Welsh resort - and no dull resort (9)
18: Sounds like a bright child (3).
19: First aid for sprains is common in the arctic. (3, 4)
20: Reportedly regret cutting remark in quarrel (7)
21: Going after the final piece of puzzle for a very long time (3)
22: In service? Fire rifle (7)
23: One eating little head of lettuce held by cook in hot water (7)
24: Small pieces of choral works missing tenor part (5)
27: 4-down Arias hit high note in some of the lungs (3,3)