Food that can be drunk (5)

I believe the answer is:

toast

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'food' is the definition.
(toast is a kind of food)

I cannot understand how the remainder of the clue works.

(Other definitions for toast that I've seen before include "cooked 13 [BREAD]" , "Breakfast slice" , "Drink to the healt of" , "Tribute (plus a clinking of glasses?)" , "Food (that one can drink!)" .)

I've seen this clue in the Evening Standard.

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