Impulsive peer group producing something out of nothing (11,10)

I believe the answer is:

spontaneous generation

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'impulsive peer group producing something out of nothing' is the definition.
I can't judge whether this defines the answer.

'impulsive peer group' is the wordplay.
'impulsive' becomes 'spontaneous' (similar in meaning).
'peer group' becomes 'generation' (I've seen this before).
'spontaneous'+'generation'='SPONTANEOUS GENERATION'

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I've seen this clue in The Times.

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