1: Kept definitely in step (9)
2: Big flowers for VIPs? (4,7)
3: Martyr fighting segregation (5,6)
4: Bumped into yours truly at junction (3).
5: Interest in a revolutionary activist's broadcast (5)
6: Native American involved in drug problem exposed (5)
8: One out of three released after misstep (7)
12: One Miss Horn takes a tumble with guys having outlaw spirits (11)
13: Everyone in Italy's mad - so it's said - for ice cream (5-6)
16: Diet I'm crazy about will eventually set boundaries (7)
17: New York decries eccentric period of medical training (9)
20: Fools the Proletariat after banning Marx's _Capital_ (5)
21: Original North American time precedes 'America Latina' (5)
24: No one told sister (3)