Crossword Genius

Spinner spinning nine out to restrict runs (8)

Ross

I believe the answer is:

neutrino

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

I can't explain the remainder of the clue.

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(Other definitions for neutrino that I've seen before include "Spinner" , "Uncharged elementary particle" , "Small piece of matter" , "There's almost nothing to it!" , "This barely affects anything" .)

I've seen this clue in The Sun.
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