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Accomplished cricket side well and truly defeated (8,3)

Ross

I believe the answer is:

finished off

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'well and truly defeated' is the definition.
I can't tell whether this defines the answer.

'accomplished cricket side' is the wordplay.
'accomplished' becomes 'finished' (I can't explain this - if you can you should believe this answer much more).
'cricket side' becomes 'off'.
'finished'+'off'='FINISHED OFF'

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I've seen this clue in The Times.
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