Brief number is once seen around (7)

I believe the answer is:

concise

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'brief' is the definition.
(similar in meaning)

I cannot understand how the rest of the clue works.

(Other definitions for concise that I've seen before include "Brief, said in few words" , "Compact - brief" , "Brief but comprehensive" , "Terse" , "Expressing much in few words" .)

I've seen this clue in The Globe and Mail.

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