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Go fast to trample the vapour (4,2,3,3)

Ross

I believe the answer is:

step on the gas

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

'trample the vapour' is the wordplay.
'trample' becomes 'step on' (I've seen this in another clue).
'vapour' becomes 'gas' (I've seen this before).
'stepon'+'the'+'gas'='STEP ON THE GAS'

'to' is the link.

Can you help me to learn more?

(Other definitions for step on the gas that I've seen before include "Hurry" , "Drive faster" , "Speed up" .)

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