Crossword Genius

Person in their nineties (12)

Ross

I believe the answer is:

nonagenarian

(Other definitions for nonagenarian that I've seen before include "One in his/her nineties" , "Person between ages of 90 and 99" , "Elderly" , "One coming up to 100" , "an old one?" .)

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