Cryptic crossword clue
They reject religion, as its rules start to cause riots 11

The most common and most likely answer to this crossword clue is the 11 letter word SECULARISTS

I've seen this crossword clue in The Guardian
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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.
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What does SECULARISTS mean?

SECULARISTS noun
  1. A person who believes in or supports secularism.

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