Sorrowful poem (5)
I believe the answer is:
elegy
'sorrowful poem' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for elegy that I've seen before include "Poem of mourning" , "Plaintive poem" , "Song of lament" , "Sad or reflective poem" , "Mournful work" .)