Red-breasted songbird (5)
I believe the answer is:
robin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">red-breasted songbird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for robin that I've seen before include "Red-breasted songbird" , "Bird; Batman's aide" , "Hood, possibly" , "good fellow in the D [DREAM]" , "Small brown thrush" .)