Robbers trained wild bird (5,9)
I believe the answer is:
robin redbreast
'bird' is the definition.
(I know that robin redbreast is a type of oscine)
'robbers trained wild' is the wordplay.
'wild' indicates anagramming the letters.
'robbers'+'trained'='robberstrained'
'robberstrained' with letters rearranged gives 'ROBIN REDBREAST'.
(Other definitions for robin redbreast that I've seen before include "bird" , "Songbird" .)