Bird to get down (7)
I believe the answer is:
swallow
I believe this clue is a triple definition!
'bird' is the first definition.
(swallow is a kind of bird)
'to get' is the second definition.
(thesaurus)
'down' is the third definition.
(both can mean to consume or eat)
(Other definitions for swallow that I've seen before include "Engulf - migratory bird" , "Buy < and consume" , "Accept" , "See bird" , "Bird - drink" .)