Disallow odd golden ornament (6)
I believe the answer is:
bangle
'ornament' is the definition.
(bangle is a kind of ornament)
'disallow odd golden' is the wordplay.
'disallow' becomes 'ban' (banning is a kind of disallowing).
'odd' means one should take alternating letters.
The alternate letters of 'golden' are 'gle'.
'ban'+'gle'='BANGLE'
(Other definitions for bangle that I've seen before include "Jewellery worn around the wrist" , "A bracelet from Bengal" , "displaying charm perhaps" , "Item of jewellery" , "Rigid bracelet or anklet" .)