Rub away until eradicated! (4,3)

I believe the answer is:

wipe out

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'until eradicated' is the definition.
I know nothing about this answer so I can't judge whether this works.

'rub away' is the wordplay.
'rub' becomes 'wipe' (synonyms).
'away' becomes 'out' (similar in meaning).
'wipe'+'out'='WIPE-OUT'

Can you help me to learn more?

(Another definition for wipe out that I've seen is " Murder".)

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