Hairstyle initially adhered to? The opposite (4)
I believe the answer is:
afro
'hairstyle' is the definition.
(afro is a kind of hairstyle)
'initially adhered to? the opposite' is the wordplay.
'initially' suggests taking the first letters.
'to? the opposite' becomes 'fro' (I've seen this before).
The initial letter of 'adhered' is 'a'.
'a'+'fro'='AFRO'
(Other definitions for afro that I've seen before include "Hairdo of the 1960s and 70s" , "Tightly-curled 4 down" , "Hairstyle with tight curls" , "Hair in tight curls" , "Rounded, curled hairstyle" .)