Kind of loaf that means a lot (5)

I believe the answer is:

batch

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'lot' is the definition.
(synonyms)

I don't understand the rest of the clue.

(Other definitions for batch that I've seen before include "Lot made at one time" , "Set of items; instalment" , "All the loaves baked at the same time" , "Aggregation" , "Group of objects prepared or sent together" .)

I've seen this clue in the Evening Standard.

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