Angel's glow (4)
I believe the answer is:
halo
'angel's glow' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for halo that I've seen before include "that could make one light-headed?" , "Ring of light (signifying holiness)" , "Aura round admired person" , "Corona" , "Angel's head-light" .)