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Sharpen (4)

Ross

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4

5

'sharpen' is the definition.
(I know that hone is a more specific form of sharpen)

This is all the clue.

(Other definitions for hone that I've seen before include "Sharpen tool on stone" , "Strop" , "Smooth stone" , "Sharpen (a blade)" , "Polish" .)

I've seen this clue in The Sun, The Wall Street Journal, The Guardian, The Independent, the King Feature Syndicate, the USA Today, the Universal, The Mirror, the Penny Press, The Star Tribune, the Evening Standard, The New York Times, the LA Times and The Times.
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