Free ride in elevator (4)
I believe the answer is:
lift
I believe this clue is a double definition.
'free ride' is the first definition.
(as in a lift in someone's car)
'elevator' is the second definition.
(I know that elevator can be written as lift)
'in' acts as a link.
(Other definitions for lift that I've seen before include "It's an elevator in USA" , "Raise the vertical conveyor" , "Raise - hoist" , "remove" , "Pick up" .)