The most common and most likely answer to this crossword clue is the 10 letter word ANARCHISTS
I've seen this crossword clue in The Daily Telegraph
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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 ANARCHISTS mean?
ANARCHISTS noun- One who believes in or advocates the absence of hierarchy and authority in most forms (compare anarchism), especially one who works toward the realization of such.
- One who disregards laws and social norms as a form of rebellion against authority.
- (by extension) One who promotes chaos and lawlessness; a nihilist.
- One who resents outside control or influence on his or her life, in particular a government, and therefore desires the absence of political control.