Sulky look (4)
I believe the answer is:
pout
'sulky look' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pout that I've seen before include "Push lips out as sign of annoyance" , "Look miffed" , "Put one's lips out; fish" , "Look sullen" , "Look sulky" .)