Goddess consumed the bird within (6)
I believe the answer is:
athene
'goddess' is the definition.
(Greek goddess)
'consumed the bird within' is the wordplay.
'consumed' becomes 'ate' (to eat is to consume food).
'the bird' becomes 'hen' (hen is a kind of bird).
'within' is an insertion indicator.
'ate' going around 'hen' is 'ATHENE'.
(Other definitions for athene that I've seen before include "Wise woman" , "Pallas -, Gr. goddess" , "deity" , "Minerva was Roman counterpart of this goddess" , "patroness of the arts!" .)