Arrogant one (4)
I believe the answer is:
snob
'arrogant one' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for snob that I've seen before include "One looks down on others" , "One for whom social status matters" , "One attaching importance to social position" , "One places too high a value on social status" , "Social climber" .)