The most common and most likely answer to this crossword clue is the 10 letter word ENACTMENTS
I've seen this crossword clue in The Guardian
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More clues leading to the result ENACTMENTS
Buddy explains!

The straight part
We know that "performances" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case performances = enactments.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 ENACTMENTS mean?
ENACTMENTS noun- The act of enacting, or the state of being enacted.
- A piece of legislation that has been properly authorized by a legislative body.