Sparkly crown (5)
I believe the answer is:
tiara
'sparkly crown' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tiara that I've seen before include "Woman's headdress for very formal occasions" , "Jewelled crescent-shaped headdress" , "Decorative headband" , "Pope's triple-tiered crown" , "Woman's head ornament" .)