Vehicle hard to get out of? (4)
I believe the answer is:
trap
'vehicle' is the definition.
(trap is a kind of vehicle)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for trap that I've seen before include "Part of a snare" , "Snaring device" , "Means of transport - sometimes sprung!" , "Driver's obstacle" , "Cakehole (slang)" .)