Emanation (4)
'emanation' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for aura that I've seen before include "'Air, atmosphere (4)'" , "Atmosphere, quality" , "Glorious glow" , "Air, distinctive quality" , "Perception of distinctive personality" .)
'emanation' is the definition.
(I know that emanation can be written as emission)
This is the entire clue.
(Other definitions for emission that I've seen before include "radiation leakage?" , "Process of giving out" , "Release" , "Something given out" , "it gets thrown out" .)