The most common and most likely answer to this crossword clue is the 8 letter word THRENODY
I've seen this crossword clue in The Times
T
H
R
E
N
O
D
Y
More clues leading to the result THRENODY
- Lament number finally lacking teacher put back a year
- They’d no end of dolour sadly rendering mournful song
- Drone playing amid your old lament
- Lament changes made by trendy host
- Your song of mourning could be rendered as ‘thy drone’
- Mournful song Rodney composed on Thursday
- Dreadful drone interrupts your lamentable song
- ‘Bretheren, Odysseus has a sad air‘
Buddy explains!

The straight part
We know that "Lament" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lament = threnody.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does THRENODY mean?
THRENODY noun- A song or poem of lamentation or mourning for a dead person; a dirge; an elegy.