Type of finch (6)
I believe the answer is:
linnet
'type of finch' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for linnet that I've seen before include "Common finch" , "Bird in the finch family" , "Passerine bird" , "Small finch, once popular as a caged songbird" , "A British finch" .)