The most common and most likely answer to this crossword clue is the 10 letter word REHEARSALS
I've seen this crossword clue in Financial Times
R
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More clues leading to the result REHEARSALS
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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 REHEARSALS mean?
REHEARSALS noun- The practicing of something which is to be performed before an audience, usually to test or improve the interaction between several participating people, or to allow technical adjustments with respect to staging to be done.