Crossword Genius

Harden (to) (5)

Ross

I believe the answer is:

inure

'harden to' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for inure that I've seen before include "Cause to become hardened to" , "To give experience" , "Get used to conditions" , "Accustom (someone) to something unpleasant" , "Harden, habituate" .)

I've seen this clue in The Wall Street Journal, the Universal, the USA Today, the Newsday.com and The New York Times.
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