Uppity sort (4)
I believe the answer is:
snob
'uppity sort' 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 "Snooty type" , "Socialite" , "Person with pretensions to higher social status" , "One who considers himself socially superior" , "One for whom social status matters" .)