Supply a fine car (6)
I believe the answer is:
afford
'supply' is the definition.
(I know that afford is a type of supply)
'a fine car' is the wordplay.
'fine' becomes 'f' (abbreviation).
'car' becomes 'ford' (Ford is a make of car).
'a'+'f'+'ford'='AFFORD'
(Other definitions for afford that I've seen before include "Able to bear the expense" , "Provide (an opportunity)" , "Provide; manage to pay for" , "Be able to spare the money" , "Provide; be able to pay for" .)