Inverted v (5)
I believe the answer is:
caret
'inverted v' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for caret that I've seen before include "A sign something is missing" , "Proofreading sign for 'Insert'" , "this reveals something missing" , "Weeding tool" , "Upward arrow mark" .)