Company car; notice reconstruction and modification (10)

I believe the answer is:

correction

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'modification' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'company car notice reconstruction' is the wordplay.
'company' becomes 'co' (abbreviation).
'car' becomes 'RR' (Rolls Royce).
'reconstruction' indicates an anagram (I've seen 'reconstructions' mean this).
'notice' is an anagram of 'ection'.
'co'+'rr'+'ection'='CORRECTION'

'and' acts as a link.

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

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