Well-honed (4)

I believe the answer is:

keen

'well-honed' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for keen that I've seen before include "Agog" , "Fierce - sharp" , "Enthusiastic or sharp" , "Penetrating; ardent" , "devoted" .)

I've seen this clue in the Wall Street Journal, the King Feature Syndicate, the Newsday, the Newsday.com and the L.A. Times Daily.

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