Crossword Genius

It's got all the answers (3)

Ross

I believe the answer is:

key

'it's got all the answers' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for key that I've seen before include "//www.crosswordgiant.com/crossword-clue/1252911/" , "Coral reef off southern coast of Florida" , "(3)" , "Essential; solution" , "One that locks" .)

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