Ornamental box (6)
I believe the answer is:
casket
'ornamental box' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for casket that I've seen before include "Ornamental box" , "Box for jewellery, or corpse" , "Jewel box" , "Jewel-box" , "Small box for holding jewellery" .)