The most common and most likely answer to this crossword clue is the 8 letter word CONCERTO
I've seen this crossword clue in Financial Times
C
O
N
C
E
R
T
O
More clues leading to the result CONCERTO
- Previously king in court would want old instrumental piece
- Piece of music from show, last in 'Chicago'
- Business limited to composer’s work
- Chapter two ends, having covered preÂvious work by 14?
- Business finally failing to work for musicians
- Together in this love for piece of music
- Harmony and love in musical work
- Expression of wonder about note a sure thing in virtuoso piece
- Study awful rot written about church music
- Care endlessly given to musical composition
Buddy explains!

The straight part
We know that "musical work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case musical work = concerto.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 CONCERTO mean?
CONCERTO noun- A piece of music for one or more solo instruments and orchestra.