Discrimination to defer carbon fine arbitrarily (10)

I believe the answer is:

difference

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

I can't explain the remainder of the clue.

(Other definitions for difference that I've seen before include "Argument - dissimilarity" , "Diversity" , "Change" , "Discrimination" , "row" .)

I've seen this clue in the Sydney Morning Herald.

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