Social slight (4)
I believe the answer is:
snub
'social slight' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for snub that I've seen before include "Cut; ignore" , "Rebuff or reject someone" , "Insult by ignoring" , "Shun" , "Ignore, spurn disdainfully" .)