Crossword Genius

Courage; stony powder (4)

Ross

I believe the answer is:

grit

(Other definitions for grit that I've seen before include "Hard particles for firmness of character" , "Toughness" , "Jock's enormous" , "Fragments to sprinkle on roads" , "Courage - clench - small particle of stone" .)

I've seen this clue in the Sydney Morning Herald.
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