Finch (6)
I believe the answer is:
linnet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">finch</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that linnet is a type of finch)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for linnet that I've seen before include "Type of finch" , "Songbird in Lent" , "Finch so named because it feeds on flax" , "Yeats's song-bird" , "Songbird (to 6 18)" .)