Crossword Genius

Never retired — a hundred! (3)

Ross

I believe the answer is:

ton

'a hundred' is the definition.
(I've seen this before)

'never retired' is the wordplay.
'never' becomes 'not' (I've seen this in other clues).
'retired' is a reversal indicator.
'not' backwards is 'TON'.

(Other definitions for ton that I've seen before include "Heavyweight" , "People of fashion" , "Speed" , "2,240 lbs" , "Unit of weight equivalent to 2240 pounds" .)

I've seen this clue in The Times.
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