Hair colour with golden glow (6)
I believe the answer is:
auburn
'hair colour' is the definition.
(I've seen this before)
'with golden glow' is the wordplay.
'with' means one lot of letters go next to another.
'golden' becomes 'au'.
'glow' becomes 'burn' (synonyms).
'au' next to 'burn' is 'AUBURN'.
(Other definitions for auburn that I've seen before include "Reddish-brown hair colour" , "Shade of hair" , "Of hair colour, reddish brown (6)" , "Shade of brown" , "Red-brown hair colouring" .)