Chauffeur-driven car (4)
I believe the answer is:
limo
'chauffeur-driven car' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for limo that I've seen before include "Set of rooms" , "Long motor" , "Luxury car" , "Luxurious car (colloq.)" , "Stretched car, often used for partying" .)