Unorthodox contracts for a bridge player (5)
I believe the answer is:
north
'a bridge player' is the definition.
(cardinal directions represent the bridge players)
'unorthodox contracts' is the wordplay.
'contracts' indicates the answer is hidden within the clue (I've seen 'contracted' mean this).
'NORTH' can be found hidden inside 'unorthodox'.
'for' is the link.
(Other definitions for north that I've seen before include "Top of most maps" , "One looking for contract" , "Lord -, PM; bearing" , "PM 1770-82" , "Towards top of map" .)