Crossword Genius

Mystery (6)

Ross

There are a few possibilities for this:

'mystery' is the definition.
(I know that mystery can be written as secret)

This is all the clue.

(Other definitions for secret that I've seen before include "Inner" , "Concealed" , "Confidential or mysterious" , "Security marking" , "One not to be divulged" .)

I've seen this clue in the USA Today, The Telegraph, The Guardian, the Universal, the Penny Press, the LA Times, The Independent, the Evening Standard, The Star Tribune, The Mirror and The Times.
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