Such a sum, presumably, has no odd pence (4)

I believe the answer is:

tidy

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'such' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?

I don't understand the remainder of the clue.

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(Other definitions for tidy that I've seen before include "Spruce up" , "Neat and orderly" , "Considerable (sum); neat" , "Arranged neatly" , "Spick-and-span" .)

I've seen this clue in the Evening Standard.

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