Nimbus (4)
'nimbus' is the definition.
(synonyms)
This is all the clue.
(Other definitions for aura that I've seen before include "'Air, atmosphere (4)'" , "Indiscernible quality" , "Air, distinctive character" , "Distinct but intangible quality about a person" , "Characteristic air of person" .)
'nimbus' is the definition.
(I know that nimbus can be written as halo)
This is the entire clue.
(Other definitions for halo that I've seen before include "Aureole" , "Circle of light around the moon" , "Sign of a saint" , "Glittering aura" , "Sign of holiness" .)
'nimbus' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for cloud that I've seen before include "Cumulus, for example" , "Mass of water droplets" , "Mass of vapour visible in the air" , "Source of rain" , "Mass of airborne water vapour" .)