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Agatha Order is mostly tied right inside (8)

Ross

I believe the answer is:

christie

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(Other definitions for christie that I've seen before include "'Agatha..., crime writer (8)'" , "our 1/4 Across [GOLD MEDALLIST] in 1992" , "Serial killer" , "family with lots to do?" , "Agatha ---, novelist; John ---, murderer" .)

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