Zero charge for oversight (8)

I believe the answer is:

omission

'oversight' is the definition.
(omission is a kind of oversight)

'zero charge' is the wordplay.
'zero' becomes 'O' (O resembles 0).
'charge' becomes 'mission' (synonyms).
'o'+'mission'='OMISSION'

'for' acts as a link.

(Other definitions for omission that I've seen before include "Gap" , "Deficiency" , "Leaving-out, oversight" , "Mistake resulting from neglect" , "Something lacking" .)

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

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