Being sufficient for driving as far as (7,2)

I believe the answer is:

running to

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'far as' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'being sufficient for driving' is the wordplay.
'being sufficient' becomes 'to' (I can't explain this - if you can you should give a lot more credence to this answer).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'driving' becomes 'running' ('run' can be a synonym of 'drive').
'to' put after 'running' is 'RUNNING TO'.

'as' acts as a link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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