The most common and most likely answer to this crossword clue is the 8 letter word CANTATAS
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Buddy explains!
The straight part
We know that "Musical works" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case musical works = cantatas.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 CANTATAS mean?
CANTATAS noun- A vocal composition accompanied by instruments and generally containing more than one movement, typical of 17th and 18th century Italian music.