Bird giving a shriek? (6)
I believe the answer is:
shrike
'bird' is the definition.
(shrike is a kind of bird)
'giving a shriek?' is the wordplay.
'giving' indicates an anagram (the letters give the letters for another word).
'shriek' with letters rearranged gives 'SHRIKE'.
(Other definitions for shrike that I've seen before include "Songbird with a heavy hooked bill" , "Shriek like kind of bird" , "Predatory songbird" , "Butcherbird" , "Butcher bird" .)