Crossword Genius

Near ancient doddery oldster (11)

Ross

I believe the answer is:

centenarian

'oldster' is the definition.
(centenarian is a kind of oldster)

'near ancient doddery' is the wordplay.
'doddery' is an anagram indicator.
'near'+'ancient'='nearancient'
'nearancient' is an anagram of 'CENTENARIAN'.

(Other definitions for centenarian that I've seen before include "Person of a great age" , "Person a hundred or more in age" , "old human being" .)

I've seen this clue in The Telegraph.
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