Trade in timber in Kentish Town? (4)
I believe the answer is:
deal
This clue is a triple definition!
'trade in' is the first definition.
(thesaurus)
'timber' is the second definition.
(deal is a kind of timber)
'in' acts as a link.
'kentish town?' is the third definition.
(Deal is a town in Kent)
(Other definitions for deal that I've seen before include "Lead out of the pine wood" , "split deck" , "Bargain, contract" , "Pass around (e.g. cards)" , "Board" .)