Crossword Genius

Subatomic particle (5)

Ross

'subatomic particle' is the definition.
(quark is a kind of subatomic particle)

This is the entire clue.

(Other definitions for quark that I've seen before include "Fundamental subatomic particle - low-fat soft cheese" , "Hypothetical particle" , "Proton constituent" .)

I've seen this clue in the Newsday, the King Feature Syndicate and The Times.
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