Banshee's call (4)
I believe the answer is:
wail
'banshee's call' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wail that I've seen before include "Howl" , "Long cry, as of siren" , "Lament loudly" , "Whimper" , "Cry of grief" .)