A ring, twice damaged, is incriminating (10)

I believe the answer is:

arraigning

'incriminating' is the definition.
(arraigning is a kind of incriminating)

I can't explain the remainder of the clue.

(Other definitions for arraigning that I've seen before include "putting in front of bench" , "Calling before a court to answer charge" .)

I've seen this clue in The Independent.

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