One having basic craft for a bit of carpentry (6)
I believe the answer is:
rafter
This clue is a double definition.
'one having basic craft' is the first definition.
(a raft is a basic craft or boat)
'a bit of carpentry' is the second definition.
(rafter can mean a wooden beam)
'for' is the link.
(Other definitions for rafter that I've seen before include "support" , "Strong wooden beam for roof" , "person on floating logs" , "Sloping roof timber" , "See retired Aussie tennis player" .)