Poetic lament (5)
I believe the answer is:
elegy
'poetic lament' 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 "Sad or reflective poem" , "that may be on the dead" , "Poetic lament (in a country churchyard?)" , "Requiem" , "Mournful verse" .)