The most common and most likely answer to this crossword clue is the 5 letter word NONET
I've seen this crossword clue in The Times
N
O
N
E
T
More clues leading to the result NONET
- Work trapeze artistes are ill-advised to have
- Muses, say, why fishing might be unsuccessful?
- Work trapeze artists are ill-advised to have?
- Nine hence unable to play tennis?
- Group with holy books, including cardinal
- Musical work: I must be inspired holy writ?
- A piece that’s just gross?
- Piece contributing to compilation one thousand
- Musical group that gets the joint jumping
- Northern town initially housing a single music group
Buddy explains!

The straight part
We know that "Musical group" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case musical group = nonet.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 NONET mean?
NONET noun- A composition for nine instruments or nine voices.
- A group of nine nuclear or subatomic particles.
- A byte of nine bits.