Howl in grief (7)
I believe the answer is:
ululate
'howl in grief' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ululate that I've seen before include "Express grief" , "Give a hoot" , "Howl, wail, screech" , "Emit long, loud wails" , "Howl loudly" .)