Something to do with bread (5)

I believe the answer is:

slice

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'with bread' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see a link between them that I can't see?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for slice that I've seen before include "poor golf shot" , "Cut into portions" , "share" , "Portion of pizza" , "shot in golf that goes astray" .)

I've seen this clue in the Evening Standard.

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