Does he turn a hair, possibly? (5)
I believe the answer is:
uriah
'does he' is the definition.
'Uriah' can be an answer for 'he'. I'm unsure of the 'does' bit.
'turn a hair possibly?' is the wordplay.
'turn' becomes 'U' (a 'U-turn' is a kind of turn).
'possibly?' is an anagram indicator (I've seen 'possibly' mean this).
'hair' is an anagram of 'riah'.
'u'+'riah'='URIAH'
Can you help me to learn more?
(Other definitions for uriah that I've seen before include "Dickens hypocrite ..... Heep" , "Husband of Bathsheba" , "Biblical figure" , "'Umble --- Heep (Dickens)" , "... Heep, obsequious character in David Copperfield (Dickens)" .)