Bespangle or bejewel, say (5)
I believe the answer is:
adorn
This clue is a double definition.
'bespangle' is the first definition.
(I've seen this in another clue)
'bejewel say' is the second definition.
(bejewelling is a kind of adorning)
(Other definitions for adorn that I've seen before include "Deck" , "Embellish, decorate" , "get dressed!" , "Attire" , "Bedeck" .)