Chaps pocketing charity for girl (6)
I believe the answer is:
maiden
'girl' is the definition.
(I know that maiden is a type of girl)
'chaps pocketing charity' is the wordplay.
'chaps' becomes 'men' (chap can mean a man).
'pocketing' means one lot of letters goes inside another (pocket can mean to steal or take possession of).
'charity' becomes 'aid' (eg foreign aid).
'men' enclosing 'aid' is 'MAIDEN'.
'for' acts as a link.
(Other definitions for maiden that I've seen before include "Over in cricket in which no runs are scored" , "Of an aunt, unmarried" , "over, you won't score" , "horse that's never won" , "Unmated; runless over" .)