Crossword Genius

Make germ-free (9)

Ross

I believe the answer is:

sterilise

(Other definitions for sterilise that I've seen before include "Make free from bacteria" , "Make free from micro-organisms, like surgeon's knife" , "Disinfect" , "Free from germs" , "Listerise (anag)" .)

I've seen this clue in the Sydney Morning Herald and The Guardian.
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