Hard to comb (6)
I believe the answer is:
matted
'hard to comb' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for matted that I've seen before include "Like some wickets" , "Closely tangled as hair may be" , "Tangled and unkempt, as hair may be" , "Of hair, tangled and uncombed" , "Tangled into a mass" .)