Villain is skipper? (7)
I believe the answer is:
I believe this clue is a double definition.
'villain' is the first definition.
(bounder is a kind of villain)
'is skipper?' is the second definition.
(I have seen 'The skipper' mean 'bounder' so perhaps 'skipper' could also mean 'bounder')
(Other definitions for bounder that I've seen before include "Dishonourable man (dated colloq.)", "A cad - or a kind of jumper", "The skipper", "Untrustworthy type (once)", "A hop-along cad?".)