Political journo recalculating spill, denied by civic fringes (5,6)

I believe the answer is:

laura tingle

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'political journo recalculating spill denied' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'by civic fringes' is the wordplay.
I cannot really understand how this works, but
'by' could be 'at' and 'at' is located in the answer.
This explanation may well be incorrect...

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

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