How to get there with injured foot? Hurry (3,2,2)

I believe the answer is:

hop to it

I'm a little stuck... Click here to teach me more about this clue!

'there with injured foot? hurry' is the definition.
I know nothing about this answer so I can't judge whether this works.

'how to' is the wordplay.
I cannot really see how this works, but
'to' is present in the answer.
The remaining letters 'hopit' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'get' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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