Car with a folding roof (9)
I believe the answer is:
cabriolet
'car with a folding roof' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cabriolet that I've seen before include "vehicle" , "Car with a folding roof" , "Light two-wheeled carriage" , "convertible" , "Car with a folding top -- trace boil (anag)" .)