Crossword Genius

Edible rock (4)

Ross

I believe the answer is:

salt

'edible rock' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for salt that I've seen before include "dry wit" , "A defence against ice" , "NaCl" , "Preserve" , "Seasoning; old sailor" .)

I've seen this clue in the Newsday.com and the Newsday.
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