Being in favour of making an attack (5,3)

I believe the answer is:

going for

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'making an attack' is the definition.
I can't judge whether this defines the answer.

'being in favour' is the wordplay.
'being' becomes 'going' (I am not sure about this - if you are sure you should believe this answer much more).
'in favour' becomes 'for' (as in being for a particular cause).
'going'+'for'='GOING FOR'

'of' is the link.

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I've seen this clue in The Globe and Mail.

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