The most common and most likely answer to this crossword clue is the 5 plus 4 letter word STEEL BAND
I've seen this crossword clue in Financial Times
S
T
E
E
L
B
A
N
D
More clues leading to the result STEEL BAND
- Move silently, forbidden to speak, beating team
- On the airwaves, Nick ruled out drummers
- Nick not allowed in audition with group of musicians
- A group of West Indians making various bongs?
- Musicians form it for support after soprano joins large company
- West Indian players with a strong all-rounder
- Musicians in nick outlawed? Sounds like that
- Musicians from south are inclined to tour Mediterranean island
- Musicians need blast to be blasted
- Speaker's take censored for the audience by a Caribbean musical group
Buddy explains!

The straight part
We know that "Musicians" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case musicians = steel band.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.