Bird gets a part in study (5)
I believe the answer is:
capon
'bird' is the definition.
(capon is a kind of bird)
'a part in study' is the wordplay.
'a part' becomes 'ap' (I can't justify this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'study' becomes 'con' (con can informally mean to study).
'ap' inserted inside 'con' is 'CAPON'.
'gets' acts as a link.
Can you help me to learn more?
(Other definitions for capon that I've seen before include "Castrated cock fowl" , "Bird fattened for eating" , "for lunch, perhaps" , "fowl fattened for pot" , "Castrated rooster fattened for eating" .)