Autobiographer and I worried Iris and Tom (9)
I believe the answer is:
memoirist
'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".)