Traders possibly accepting nothing for such a vehicle (8)
I believe the answer is:
roadster
'such a vehicle' is the definition.
(roadster is a kind of vehicle)
'traders possibly accepting nothing' is the wordplay.
'possibly' indicates an anagram.
'accepting' means one lot of letters goes inside another.
'nothing' becomes 'o' (looks like zero - 0).
'traders' with letters rearranged gives 'radster'.
'radster' placed around 'o' is 'ROADSTER'.
'for' is the link.
(Other definitions for roadster that I've seen before include "Old car" , "Open-topped car" , "sporty vehicle" , "Open two-seater car" , "An open car without rear seats" .)