Bear disdainful expression (4)
I believe the answer is:
pooh
I believe this is a double definition.
'bear' is the first definition.
(Winnie the Pooh)
'disdainful expression' is the second definition.
(Other definitions for pooh that I've seen before include "4 - expression of disgust" , "Honey-loving bear" , "Milne's bear" , "Bear of very little brain" , "Famous bear" .)