Ambience (10)
'ambience' is the definition.
(synonyms)
This is all the clue.
(Other definitions for atmosphere that I've seen before include "Air" , "blue?" , "Feel" , "climate" , "Pervading tone or mood" .)
'ambience' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for aura that I've seen before include "Supposed emanation surrounding the body" , "distinctive impression" , "Mystic air" , "Nimbus" , "Emanation - distinctive air" .)