Crossword Genius

Code word for S (6)

Ross

I believe the answer is:

sierra

'code word for s' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for sierra that I've seen before include "Mountain range -- code word for S" , "A Spanish mountain chain (6)" , "Vehicle" , "Mountain range in Spanish-speaking countries" , "Spanish range of mountains" .)

I've seen this clue in The Guardian and The Mirror.
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