Set point lost, but make quick progress (4,2,2)

I believe the answer is:

step on it

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'make quick progress' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'set point lost' is the wordplay.
'lost' indicates an anagram.
'set'+'point'='setpoint'
'setpoint' with letters rearranged gives 'STEP ON IT'.

'but' acts as a link.

Can you help me to learn more?

(Other definitions for step on it that I've seen before include "Hurry! - set point (anag)" , "Get a move on!" , "Move quickly" , "Go for speed" , "to flatten an insect?" .)

I've seen this clue in The Telegraph.

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