Crossword Genius

The Boys in Blue, or Blur? (4)

Ross

I believe the answer is:

fuzz

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'blur?' is the definition.
(thesaurus)

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

Can you help me to learn more?

(Other definitions for fuzz that I've seen before include "Frizzy hair; blurred image" , "Indistinctness" , "Covering of fine hair - police" , "Hairy layer" , "Soft, fine hair; blur" .)

I've seen this clue in The Guardian.
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