Awfully good, won't be beaten by (2,4,2)

I believe the answer is:

go down to

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'by' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'awfully good won't be beaten' is the wordplay.
'awfully' is an anagram indicator.
'be beaten' indicates an anagram (letters beaten up or destroyed).
'good' anagrammed gives 'godo'.
'wont' with letters rearranged gives 'wnto'.
'godo'+'wnto'='GO DOWN TO'

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I've seen this clue in the Evening Standard.

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