Mournful song (5)
'mournful song' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elegy that I've seen before include "Poem as Gray's in churchyard" , "Song of mourning" , "Plaintive poem" , "Song of lamentation" , "lines of regret" .)
'mournful song' is the definition.
(piece of music lamenting the dead)
This is the entire clue.
(Other definitions for dirge that I've seen before include "Dreary song" , "dreary tune" , "Lamentation" , "Slow, sad song" , "air?" .)