Crossword Genius

Sharpen, as an appetite (4)

Ross

I believe the answer is:

whet

'sharpen as an appetite' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for whet that I've seen before include "Sharpen - stimulate" , "Make more acute" , "Make keen" , "Arouse" , "Sharpen by grinding" .)

I've seen this clue in the Newsday.
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