Butcher bird (6)
I believe the answer is:
shrike
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">butcher bird</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 shrike that I've seen before include "Shriek like kind of bird" , "Butcher bird" , "Songbird with a heavy hooked bill" , "Butcherbird" , "Predatory songbird" .)