Affectation of superiority (4)
I believe the answer is:
airs
'affectation of superiority' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for airs that I've seen before include "feelings" , "Tunes and posturings" , "Voices" , "affected demeanour" , "Haughty affectation" .)