1: Offering resistance, cattle run wild (9)
2: Trumpeter is a young person with a pullover (9)
3: Tarpon's head is covered by more opulent kind of scale (7)
4: Gershwin comes back on train with tortured spirit (5)
5: Surer rate confused Washington money maker (9)
6: Sitting in tree, sparrow's beginning song (5)
7: Excellent osseous dark wood (5)
8: Ideas educate to reveal that things have relaxed.(5)
13: Write down 'In mink, not frozen'? (9)
14: Completely drenched, laid umbrella tip gauge down (9)
15: Moldering, moldering panhandler? (4,5)
17: Windows creator more neglectful after hearing's end (7)
18: Notice District Governor in the cyperaceous plant? (5)
19: Entertain one of nine daughters of Mnemosyne (5)
20: Bound to hear what they did about the leak? (5)
21: Fools the Proletariat after banning Marx's _Capital_ (5)