1: First bud to emerge in flower. (5)
2: Zoo custodians hear significant animal noises (7)
3: Managed in lower Antwerp (3)
4: Miserable raise follows poor grade (5)
5: Crazy to clean sons in awful mess (11)
6: Ruck dangerously, stop when many are involved. (5)
7: New Moslem art depicts turbulent situation (9)
9: A sign Tommy's upset about patrol leader (7)
12: Toff aimed to do himself proud. (11)
14: Tot gets $1,000 for the piano! (4,5)
15: ...implies it hasn't changed (5,2)
19: A vagrant fishing-boat (7)
21: Allow meathead into mine opening (5)
23: Put down explosive material about a union member (5)
24: The world's broken heart (5)
27: He wrote a bit of poetry! (3)