Fancy jewellery (5)
I believe the answer is:
bling
'fancy jewellery' is the definition.
(bling can mean jewellery)
This is all the clue.
(Other definitions for bling that I've seen before include "Showy jewellery" , "Jewellery for show" , "Flashy, ostentatious jewellery" , "Jazzy" , "glitzy jewellery" .)