Attacking keen new gin cocktail (7)

I believe the answer is:

kneeing

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'attacking' is the definition.
Both the answer and definition are present participle verbs.
Maybe you can see an association between them that I can't see?

'keen new gin cocktail' is the wordplay.
'new' indicates anagramming the letters.
'cocktail' indicates an anagram.
'keen' with letters rearranged gives 'knee'.
'gin' with letters rearranged gives 'ing'.
'knee'+'ing'='KNEEING'

Can you help me to learn more?

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

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