A word for the wise (7)

I believe the answer is:

sapient

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'for the wise' is the definition.
(I've seen this in another clue)

I can't explain the remainder of the clue.

(Other definitions for sapient that I've seen before include "Canny" , "of great wisdom" , "Having intelligence" , "very keen" , "Discerning" .)

I've seen this clue in The Globe and Mail and The Telegraph.

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