Certain vibe (4)
I believe the answer is:
aura
'certain vibe' 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 "Intangible something around a person" , "Supposed emanation surrounding the body" , "distinctive impression" , "Distinct but intangible quality about a person" , "Distinctive quality (of something or someone)" .)