Crossword Genius

Trade, one might be asked to mind one's own (8)

Ross

I believe the answer is:

business

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'trade' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for business that I've seen before include "Occupation; concern" , "Baby" , "Commerce, trace" , "Affair - matters to be attended to" , "complicated problem" .)

I've seen this clue in The Telegraph.
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