Story editor backed up report (9)

I believe the answer is:

accounted

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'backed up report' is the definition.
The definition and answer can be both to do with ownership as well as being past participle verbs.
Perhaps there's a link between them I don't understand?

'story editor' is the wordplay.
'story' becomes 'account' ('account' can be a synonym of 'story').
'editor' becomes 'ed'.
'account'+'ed'='ACCOUNTED'

Can you help me to learn more?

(Another definition for accounted that I've seen is " Answered".)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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