Ride to the prom (4)
I believe the answer is:
limo
'ride to the prom' 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 "Stretched car (abbr)" , "Set of rooms" , "Large luxurious car" , "Luxury car" , "Stretched car, often used for partying" .)