Bird finally consumed small fruit (5)
I believe the answer is:
dates
'fruit' is the definition.
(type of fruit)
'bird finally consumed small' is the wordplay.
'finally' suggests the final letters.
'consumed' becomes 'ate' (to eat is to consume food).
'small' becomes 's' (abbreviation - e.g. clothes size).
The last letter of 'bird' is 'd'.
'd'+'ate'+'s'='DATES'
(Other definitions for dates that I've seen before include "Fruits and pre-arranged meetings" , "Goes steady" , "Trysts" , "Dried fruit" , "Palm fruit" .)