Betting angel wore glitter (7)
I believe the answer is:
spangle
'glitter' is the definition.
(I know that spangle is a type of glitter)
'betting angel wore' is the wordplay.
'betting' becomes 'sp'.
'wore' indicates anagramming the letters (I've seen 'wearing' mean this (wear can mean to become damaged)).
'angel' is an anagram of 'angle'.
'sp'+'angle'='SPANGLE'
(Other definitions for spangle that I've seen before include "glitter" , "Colourful spot" , "Glittering ornament" , "it glitters" , "Glittery item" .)