Questlove's hairstyle (4)
I believe the answer is:
afro
'questlove's hairstyle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for afro that I've seen before include "Big hairstyle" , "Hairstyle with tight curls" , "Styling done to hair" , "Hair in tight curls" , "Of hair style, tightly curled and bushy" .)