Crossword Genius

After breaking two hips, older relative wants new implant (7)

Ross

I believe the answer is:

ingrain

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'implant' is the definition.
(thesaurus)

I don't understand the rest of the clue.

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(Other definitions for ingrain that I've seen before include "deeply impressed" , "Fix" , "Impress deeply on the mind" , "Raining? (anagram)" , "Make a habit" .)

I've seen this clue in The Guardian.
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