The most common and most likely answer to this crossword clue is the 10 letter word GREENHORNS
I've seen this crossword clue in The Guardian
G
R
E
E
N
H
O
R
N
S
Buddy explains!
The straight part
We know that "Young and inexperienced musicians" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case young and inexperienced musicians = greenhorns.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 GREENHORNS mean?
GREENHORNS noun- An inexperienced person; a novice, beginner or newcomer