Gives an edge (5)

I think it could be either:

hones

whets

'gives an edge' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for hones that I've seen before include "Sharpens on strap, say razor" , "Perfects, sharpens" , "Sharpens as on whetstone" , "Sharpens, like knife on stone" , "gets sharp" .)

I've seen this clue in the Wall Street Journal and The New York Times.

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