The most common and most likely answer to this crossword clue is the 6 letter word OPUSES
I've seen this crossword clue in Independent
O
P
U
S
E
S
More clues leading to the result OPUSES
- The works of O Henry missing from promotions?
- Works quietly to stop old habits
- Works bringing power into Cockney homes?
- Works round application in footnote
- Spouse unfortunately works
- Returning in due course carrying exercises involving American works
- Works with potential spouse
- Employs old piano at first for compositions
- Musical pieces — old piano exercises
- Old party leader works and works
Buddy explains!

The straight part
We know that "works" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case works = opuses.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 OPUSES mean?
OPUSES noun- A work of music or set of works with a specified rank in an ordering of a composer's complete published works.
- A work, especially of art.