Butcherbird (6)
I believe the answer is:
shrike
'butcherbird' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shrike that I've seen before include "Shriek like kind of bird" , "Butcher bird" , "Songbird with a heavy hooked bill" , "Predatory songbird" , "Butcherbird" .)