Surrounding glow (4)
I think it could be either:
'surrounding glow' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aura that I've seen before include "Atmosphere [ital]" , "Peculiar sensations" , "Emanation - distinctive air" , "Distinctive character, essence of a living thing" , "Perception of distinctive personality" .)
'surrounding 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 "Circle over a saint" , "Circle painted over saint's head" , "Corona" , "Saint's circle of light" , "Sign of a saint" .)