Green’s Dictionary of Slang

(UK black) an attractive young woman.

1940		D. Burley N.Y. Amsterdam News 19 Oct, 20: A ‘banter’ is a chick who started out to be a Glamour Gal, but wound up on the wrong side of the fence.
1943		D. Burley N.Y. Amsterdam Star-News 22 May 11: I want my banter to really canter, she must be Five by Five.
1943		D. Burley N.Y. Amsterdam News 9 Oct. 20: Up pops a banter play built on a coke frame frocked down to Ain’t It a Shame.
1944		D. Burley N.Y. Amsterdam News 16 Sept. 12A: I’m great on all banta issues.