Fruit always consumed by father (6)
I believe the answer is:
papaya
'fruit' is the definition.
(I know that papaya is a type of fruit)
'always consumed by father' is the wordplay.
'always' becomes 'ay' (archaic term for 'always').
'consumed by' indicates putting letters inside (inserted letters get consumed).
'father' becomes 'papa' (papa is a kind of father).
'ay' going into 'papa' is 'PAPAYA'.
(Other definitions for papaya that I've seen before include "Tropical yellow fruit" , "Fruit with orange flesh" , "Custard apple" , "Caribbean fruit" , "Tropical green-skinned fruit" .)