Spangle (6)
I believe the answer is:
sequin
'spangle' is the definition.
(I know that spangle can be written as sequin)
This is the entire clue.
(Other definitions for sequin that I've seen before include "Glittery decoration" , "Small circular spangle for ornamenting clothing" , "Shiny decorative disc" , "Small shiny disc on a garment" , "Ballroom dancer's sewn-on sparkler?" .)