Golden glow in hair colour (6)
I believe the answer is:
auburn
'hair colour' is the definition.
(I've seen this before)
'golden glow' is the wordplay.
'golden' becomes 'au'.
'glow' becomes 'burn' (synonyms).
'au'+'burn'='AUBURN'
'in' is the link.
(Other definitions for auburn that I've seen before include "Name of Goldsmith's deserted village (6)" , "Shade of brown" , "Reddish-brown hair colour" , "Copper" , "Reddish-brown, hair say" .)