Crossword Genius

The way in which so many of us travel (4,6)

Ross

I believe the answer is:

busy street

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

'the' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'way in which so many of us travel' is the wordplay.
I cannot quite understand how this works, but
'way' could be 'street' (street is a kind of way) and 'street' is located in the answer.
'us' is within the answer.
The remaining letters 'by' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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