Punishes, but not for wrongs? (8)

I believe the answer is:

corrects

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'punishes' is the definition.
(correcting is a kind of punishing)

I cannot understand how the rest of the clue works.

(Other definitions for corrects that I've seen before include "Rectifies" , "Removes errors" , "Adjusts, puts right" , "Amends" , "Makes right" .)

I've seen this clue in the Evening Standard.

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