Sort of dish rebellious group, becoming fossils (12)

I believe the answer is:

petrifaction

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'sort of dish rebellious group becoming fossils' is the definition.
I can't judge whether this defines the answer.

'sort of dish rebellious group' is the wordplay.
'sort of dish' becomes 'petri' (I've seen this before).
'rebellious group' becomes 'faction' (I've seen this before).
'petri'+'faction'='PETRIFACTION'

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I've seen this clue in The Guardian.

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