The most common and most likely answer to this crossword clue is the 5 plus 2 plus 3 letter word PIPES OF PAN
I've seen this crossword clue in Independent
P
I
P
E
S
O
F
P
A
N
Buddy explains!
The straight part
We know that "music-maker" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case music-maker = pipes of pan.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.