The most common and most likely answer to this crossword clue is the 5 letter word LARGO
I've seen this crossword clue in The Times
L
A
R
G
O
More clues leading to the result LARGO
- Deliberately hands round a board game
- Slow and dignified film, but not indispensible
- Regular goalkeeper keeps moving slowly
- Music from the French composer's last work
- Fat? Briefly run, slowly
- Slow music in key featured in film
- Mostly great opening for Olympic movement
- Overweight, mostly love taking it steady
- Mostly big, old and slow
- Left on fabulous ship, slowly
Buddy explains!

The straight part
We know that "Music" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case music = largo.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 LARGO mean?
LARGO noun- A very slow tempo
- A musical piece or movement in such a tempo
- Strong and stately