Primate consuming stew: it shows hunger (8)
I believe the answer is:
appetite
'hunger' is the definition.
(I've seen this before)
'primate consuming stew it' is the wordplay.
'primate' becomes 'ape' (large primate).
'consuming' indicates putting letters inside.
'stew' becomes 'pet' (both can mean a tantrum).
'pet'+'it'='petit'
'ape' enclosing 'petit' is 'APPETITE'.
'shows' is the link.
(Other definitions for appetite that I've seen before include "Physical need for food" , "Physical desire as for food" , "Desire, inclination" , "Justification for dining" , "stomach" .)