Two men interrupting occasional audit to make change (9)

I believe the answer is:

amendment

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'change' is the definition.
(amendment is a kind of change)

I don't understand how the remainder of the clue works.

(Other definitions for amendment that I've seen before include "Revision" , "maybe fifth taken by US criminal" , "Change designed to improve a text" , "Minor improvement" , "Alteration made in a formal document" .)

I've seen this clue in The Guardian.

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