Rub away until eradicated! (4,3)

I believe the answer is:

wipe out

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'until eradicated' is the definition.
I can't tell whether this definition defines the answer.

'rub away' is the wordplay.
'rub' becomes 'wipe' (wiping is a kind of rubbing).
'away' becomes 'out' (synonyms).
'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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