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 the entire 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 Newsday, the Newsday.com, The Guardian, the New York Times, the USA Today, The Wall Street Journal and the Universal.
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