Hair untangler (4)
I believe the answer is:
comb
'hair untangler' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for comb that I've seen before include "business storage unit" , "Red crest on a cock's head" , "Search well; bird's crest" , "Used to tidy hair" , "Common hair tidier" .)