Condition of wound when juvenile's head is cut (5)

I believe the answer is:

inure

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

I don't understand the remainder of the clue.

(Other definitions for inure that I've seen before include "Harden against, make tough" , "Come to accept" , "Accustom (someone) to something unpleasant" , "Temper, toughen" , "Steel" .)

I've seen this clue in The Independent.

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