Cold dessert is deformed if stirred (10)

I believe the answer is:

semifreddo

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'stirred' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'cold dessert is deformed' is the wordplay.
'is deformed' anagrams to 'SEMIFREDDO'.
However, I'm not clear how this is indicated.

'if' acts as a link.

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I've seen this clue in The Times.

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