Bejeweled headpiece (5)
I believe the answer is:
tiara
'bejeweled headpiece' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tiara that I've seen before include "It bejewels" , "Jewelled head band" , "Ornamental head band" , "Jewelled crescent-shaped headdress" , "Great delight" .)