Heavenly glow (4)
I believe the answer is:
aura
'heavenly 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 "Characteristic air of person" , "Distinctive atmosphere surrounding person or thing" , "Nimbus" , "Mystic air" , "Distinctive quality around a person or place" .)