"Stretch" car (4)
I believe the answer is:
limo
'stretch car' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for limo that I've seen before include "Large luxurious car" , "Set of rooms" , "Luxurious car (colloq.)" , "Stretched car, often used for partying" , "Stretched car (abbr)" .)