Crossword Genius

Have something to confess (3)

Ross

I believe the answer is:

own

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

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for own that I've seen before include "Possess or confess" , "Allow" , "Keep" , "Be in legal possession of (3)" , "Posses" .)

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