I'm more upset by a personal account (6)
I believe the answer is:
memoir
'a personal account' is the definition.
(I've seen this in another clue)
'i'm more upset' is the wordplay.
'upset' indicates an anagram.
'im'+'more'='immore'
'immore' anagrammed gives 'MEMOIR'.
'by' acts as a link.
(Other definitions for memoir that I've seen before include "Written account of events one has lived through" , "Written record of personal experiences" , "Written account of events in one's life" , "Personal biography" , "Biographical sketch" .)