Blow capital fast (2,1,4)

I believe the answer is:

at a clip

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'fast' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'blow capital' is the wordplay.
'blow' indicates an anagram (I've seen 'blows' mean this).
'capital' is an anagram of 'AT A CLIP'.

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

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