Cry of the shrike (6)
I believe the answer is:
shriek
'cry' is the definition.
(I know that shriek is a type of cry)
'of the shrike' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'shrike' anagrammed gives 'SHRIEK'.
(Other definitions for shriek that I've seen before include "Hikers (anag.)" , "A high-pitched shrill cry" , "Howl" , "Shrill cry of a shrike" , "Scream of pain or delight" .)