Food crazy (4)

I believe the answer is:

nuts

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'crazy' is the definition.
(nuts can informally mean crazy or mad)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for nuts that I've seen before include "Bonkers" , "Eg, filberts, hazels" , "Mad (slang)" , "Potty" , "Fruit with edible kernel" .)

I've seen this clue in The Globe and Mail.

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