Old beak in female bird (5)
I believe the answer is:
reeve
'bird' is the definition.
(reeve is a kind of bird)
'old beak in female' is the wordplay.
'old beak in' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'female' becomes 'eve' (Eve is an example).
're'+'eve'='REEVE'
Can you help me to learn more?
(Other definitions for reeve that I've seen before include "fasten rope" , "Bailiff, steward" , "Someone with a tale" , "[PILGRIM in the CANTERBURY TALES]" , "Chief magistrate, formerly" .)