Gold-imitating alloy (6)
I believe the answer is:
ormolu
'gold-imitating alloy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ormolu that I've seen before include "Alloy for gilding" , "Gold-like decoration" , "Something decorative" , "Gilt brass" , "Metalwork" .)