Form of sin overturned (7)

I believe the answer is:

version

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'form' is the definition.
(I know that version is a type of type)

I don't understand the rest of the clue.

(Other definitions for version that I've seen before include "Interpretation, account" , "Account from one point of view" , "Something a little different - so riven (anag)" , "See 24" , "Sort" .)

I've seen this clue in The Mirror.

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