In it, anarchist destroyed critic of religion (13)

I believe the answer is:

antichristian

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'critic of religion' is the definition.
The definition suggests a singular noun which matches the answer.

'in it anarchist destroyed' is the wordplay.
'destroyed' indicates an anagram.
'in'+'it'+'anarchist'='initanarchist'
'initanarchist' is an anagram of 'ANTICHRISTIAN'.

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I've seen this clue in The Times.

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