Correct all items damaged in violent upheaval (10,5)

I believe the answer is:

electrical storm

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'violent upheaval' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'correct all items damaged' is the wordplay.
'damaged' indicates anagramming the letters.
'correct'+'all'+'items'='correctallitems'
'correctallitems' anagrammed gives 'ELECTRICAL STORM'.

'in' is the link.

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I've seen this clue in The Guardian.

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