1: Wildcats left out in capital (7)
5: Dogs running around streets (7)
8: Powers-that-be cure West End of troubles fast (7)
9: I'm great, composing music (7)
11: Feed all but the first stranger (5)
12: Tiresome platitude from dim bore (7)
13: Wants - in fact, just has to have (5)
14: San Francisco athlete captures wild boar, an obvious choice (2-7)
16: Green coat for Italian composer and Spanish painter (9)
18: Youngster giving wounded first aid (5)
21: Southeastern Greek Island harbor (7)
23: Light touch of resplendence covers humble beginnings (5)
24: Before much time has elapsed a nobleman takes that over there (5,2)
25: A letter from Greece - about a sort of April flower (7)
26: and 19 A Michelangelo masterpiece right over people's heads here? (7,6)
27: Appreciate it: a large data format (7)