Crossword Genius

Reuben ingredient

Ross

I believe the answer is:

swiss

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reuben ingredient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for swiss that I've seen before include "One from Basle" , "William Tell's nationality" , "like Federer" , "Mid-European" , "Zurich native" .)

I've seen this clue in The New York Times.
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