A hundred not out (3)

I believe the answer is:

ton

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

'not out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'not' anagrammed gives 'TON'.

(Other definitions for ton that I've seen before include "Fashionable" , "Unit of weight equivalent to 2240 pounds" , "Heavyweight" , "20 cwt" , "2240lbs" .)

I've seen this clue in the Evening Standard.

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