Finch returned Ten-nil (6)
I believe the answer is:
linnet
'finch' is the definition.
(I know that linnet is a type of finch)
'returned ten-nil' is the wordplay.
'returned' says the letters should be written in reverse.
'ten'+'nil'='tennil'
'tennil' written backwards gives 'LINNET'.
(Other definitions for linnet that I've seen before include "House finch" , "A British finch" , "Passerine bird" , "North London terminus" , "Songbird in Lent" .)