Parking lot souvenir (4)
I believe the answer is:
dent
'parking lot souvenir' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dent that I've seen before include "Hollow from impact" , "Impress" , "Tend to make small depression" , "Hollow caused by a blow" , "Hollow; tend (anagram)" .)