Deny I'd broken the agreement incorporating it (10)

I believe the answer is:

contradict

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

I cannot understand how the rest of the clue works.

(Other definitions for contradict that I've seen before include "Refute" , "Have a different view" , "Gainsay" , "Be in conflict with" , "Deny" .)

I've seen this clue in the Evening Standard.

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