Supplied golden colour on a hat (6)
I believe the answer is:
fedora
'hat' is the definition.
(fedora is a kind of hat)
'supplied golden colour on a' is the wordplay.
'supplied' becomes 'fed' (feeding is a kind of supplying).
'golden colour' becomes 'or'.
'on' says to put letters next to each other.
'fed'+'or'+'a'='FEDORA'
(Other definitions for fedora that I've seen before include "O, Fred, a hat becomes you" , "Brimmed hat with creased crown" , "Cover for head" , "Headwear" , "Headgear" .)