Contract lawyers make a profit (7)
I believe the answer is:
bargain
'contract' is the definition.
(thesaurus)
'lawyers make a profit' is the wordplay.
'lawyers' becomes 'bar' (the bar can mean the legal profession).
'make a profit' becomes 'gain' (I've seen this in another clue).
'bar'+'gain'='BARGAIN'
(Other definitions for bargain that I've seen before include "Good buy" , "Special offer" , "Thing bought cheaply" , "Deal; cheap buy" , "Cheap acquisition" .)