A drink and a good thing to eat? That’s the stuff! (7)

I believe the answer is:

gingham

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But I can't explain it at all! Could you help me understand?

(Other definitions for gingham that I've seen before include "Cotton cloth woven with coloured checks" , "Fabric in a plaid weave" , "Striped, or checked, cotton fabric" , "Lightweight cotton cloth" , "Cotton cloth, maybe checked" .)

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