Smug type (4)
I believe the answer is:
prig
'smug type' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for prig that I've seen before include "Sanctimonious person" , "humbug" , "Old maid" , "Unpleasant arrogant person" , "Self-righteous person - get a grip" .)