1: Try abbreviation for South America, we hear (5)
2: Debate again, coming from behind and vaguely in the middle (7)
3: Smuggler participating in arms race? (9)
4: Smoked salmon for the auditor with hair (5)
5: Duck's primary seducer! (5)
6: We err by demolishing an alcohol producer (7)
7: Study how to endure (2,7)
9: An animal which flies high but comes back for a place to wash (7)
12: Ban professional writer (9)
14: Formic neutralises hydrochloric. (7)
15: Came back on a diet anew and wasted away (9)
16: Blamed and nailed copper, scam's leader on the inside (7)
18: Snippet from flick I esteem as more distasteful than any other (7)
20: Mother is outside with Muslim priests (5)
21: Perhaps a bathroom contractor is mentioned to a former president (5)
23: Drain off lowest part (5)