Contract is in wallet (5)
I believe the answer is:
purse
I believe this clue is a double definition.
'contract' is the first definition.
(as in pursing one's lips)
'wallet' is the second definition.
(I've seen this before)
'is in' acts as a link.
(Other definitions for purse that I've seen before include "Super (anag.)" , "Winner's prize" , "Money-pouch" , "Small money bag" , "sometimes with strings attached?" .)