Trade in sawn fir or pine timber (4)
I believe the answer is:
deal
This clue might be a double definition.
'trade in' is the first definition.
(thesaurus)
'timber' is the second definition.
(I know that deal is a type of board)
'sawn fir or pine' acts as a link.
I am not very happy about this link. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for deal that I've seen before include "Put cards on table" , "Distribute (cards); wood" , "Softwood - business transaction" , "What business folk do" , "Sawn wood" .)