Retiree perhaps finds rotten pear nauseating (14)

I believe the answer is:

septuagenarian

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'retiree perhaps' is the definition.
I can't tell whether this definition defines the answer.

'rotten pear nauseating' is the wordplay.
'rotten' indicates an anagram.
'pear'+'nauseating'='pearnauseating'
'pearnauseating' with letters rearranged gives 'SEPTUAGENARIAN'.

'finds' acts as a link.

Can you help me to learn more?

(Other definitions for septuagenarian that I've seen before include "One aged 70 to 79" , "pensioner" , "OAP" , "Elderly person" .)

I've seen this clue in The Guardian.

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