Trade in lead, perhaps (4)
I believe the answer is:
deal
'trade in' is the definition.
(thesaurus)
'lead perhaps' is the wordplay.
'perhaps' indicates an anagram.
'lead' anagrammed gives 'DEAL'.
(Other definitions for deal that I've seen before include "Kent resort" , "Fir or pine wood" , "A port, a bargain" , "Distribute cards or do business" , "Loss of life" .)