Crossword Genius

Old medicine finally changed for modern therapy (6)

Ross

I believe the answer is:

physio

'modern therapy' is the definition.
(physiotherapy)

I don't understand how the remainder of the clue works.

(Other definitions for physio that I've seen before include "One treats injuries with exercises etc., in short" , "One's paid to manhandle" , "Manipulative type" , "Masseuse maybe" , "manual worker" .)

I've seen this clue in The Times.
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