Hit the jackpot and fled (4,3)

I believe the answer is:

took off

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'hit the jackpot and fled' is the definition.
I can't tell whether this defines the answer.

'and fled' is the wordplay.
'and' becomes 'too'.
'fled' becomes 'koff' (I can't explain this - if you can you should give a lot more credence to this answer).
'too'+'koff'='TOOK OFF'

Can you help me to learn more?

(Other definitions for took off that I've seen before include "Became popular" , "became a success" , "Deducted" , "Imitated in an amusing way" , "as an impressionist?" .)

I've seen this clue in The Guardian.

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