Cry of sorrow and grief (6)
I believe the answer is:
plaint
'cry of sorrow and grief' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for plaint that I've seen before include "Legal grievance" , "Archaic word for grievance (6)" , "Legal suit" , "Mournful song" , "Accusation; charge" .)