Song of lamentation (5)
I believe the answer is:
dirge
'song of lamentation' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dirge that I've seen before include "Keen; lament" , "Requiem" , "A slow mournful song, lament for the dead" , "Funereal song" , "Mournful chant" .)