Crossword Genius

Toughen — acclimatise (5)

Ross

I believe the answer is:

inure

This clue is a double definition.

'toughen' is the first definition.
(I've seen this in another clue)

'acclimatise' is the second definition.
(I've seen this in another clue)

(Other definitions for inure that I've seen before include "Harden or accustom as to something unpleasant" , "Accustom (someone) to something unpleasant" , "Harden, make accustomed to" , "get tougher" , "Harden, habituate" .)

I've seen this clue in The Guardian.
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