Criminal given tail’s finding group after him? (10)

I believe the answer is:

vigilantes

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'group after him?' is the definition.
Although both the answer and 'him?' are nouns, they are not in the same form of the noun.

'criminal given tail's' is the wordplay.
'criminal' indicates an anagram.
'given'+'tails'='giventails'
'giventails' anagrammed gives 'VIGILANTES'.

'finding' is the link.

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I've seen this clue in The Times.

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