Crossword Genius

Reduction, diminution (9)

Ross

I believe the answer is:

decrement

I believe this is a double definition.

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

'diminution' is the second definition.
(thesaurus)

(Other definitions for decrement that I've seen before include "Reduction, diminution" , "Lost amount" .)

I've seen this clue in The Times.
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