What distinguished it from the other brushes? (10)

I believe the answer is:

difference

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'it from the other brushes?' is the definition.
The definition suggests a singular noun which matches the answer.

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

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

I've seen this clue in the Evening Standard.

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