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Autobiographer and I worried Iris and Tom (9)

Ross

I believe the answer is:

memoirist

I'm a little stuck... Click here to teach me more about this clue!

'autobiographer' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?

'i worried iris and tom' is the wordplay.
'i' becomes 'me'.
'worried' indicates anagramming the letters.
'and' says to put letters next to each other.
'iris'+'tom'='iristom'
'iristom' with letters rearranged gives 'moirist'.
'me'+'moirist'='MEMOIRIST'

'and' is the link.

Can you help me to learn more?

(Another definition for memoirist that I've seen is " biographical writer".)

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