Crossword Genius

Short division (3)

Ross

I believe the answer is:

div

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'short division' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?

This is the entire clue.

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(Another definition for div that I've seen is " Glaswegian do".)

I've seen this clue in the Evening Standard.
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