Type of hair-do (4)
I believe the answer is:
afro
This clue is a double definition.
'type of hair' is the first definition.
'do' is the second definition.
(type of hairdo)
(Other definitions for afro that I've seen before include "Retro hairdo" , "Type of 18" , "Bushy hairstyle" , "One cut" , "shock treatment?" .)