Small animal looks discontented? Looks very discontented! (6)
I believe the answer is:
scowls
'looks very discontented' is the definition.
(a scowl shows anger or discontent)
'small animal looks discontented?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'animal' becomes 'cow' (cow is a kind of animal).
'discontented?' means to remove the middle letters.
'looks' with its centre removed is 'ls'.
's'+'cow'+'ls'='SCOWLS'
(Other definitions for scowls that I've seen before include "forbidding looks" , "Bad-tempered frowns" , "Frowns with displeasure" , "Gives black looks" , "Furrows forehead in bad humour" .)