Criminal evidence of no cooking! (11,4)

I believe the answer is:

convenience food

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'criminal evidence of no cooking' is the definition.
I can't judge whether this definition defines the answer.

'criminal evidence of no cooking' is the wordplay.
'criminal' becomes 'con' (abbreviation for 'convict').
'cooking' is an anagram indicator (cook can mean to falsify or distort).
'evidence'+'of'+'no'='evidenceofno'
'evidenceofno' with letters rearranged gives 'veniencefood'.
'con'+'veniencefood'='CONVENIENCE FOOD'

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I've seen this clue in The Guardian.

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