Bumper ding (4)
I believe the answer is:
dent
'bumper ding' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dent that I've seen before include "Tend (anag.)" , "tooth (13) [FRENCH]" , "Injury to pride" , "Hollow caused by a blow" , "Tend to make small depression" .)