All answers are trees/wood/ wooden items. 12. Big jazz fan found at front of clubs.What a swinger! (5,5) 30. But a proverb beside a dead body is found at the wood yard (7) Hmm, thinking "saw"???? 48. In retrospect dumb to steal artist's trees (9)74 So stems an utterly biased game (5) Hmm, thinking word for trunks???? 80. Bishop smuggled guerrilla's arms (8) Very clever linked clues 99 and 100! Thanks in anticipation !
48. In retrospect dumb - dumb doesn't mean stupid and the word is backwards, before that a word for steal but written backwards and it starts with the way that artist is usually represented in cryptic, written backwards.