Crossword Genius

Name of the man crossing the street against the traffic lights? (3,6)

Ross

I believe the answer is:

jay walker

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

'crossing the street against the traffic lights?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'name of the man' is the wordplay.
'name' becomes 'Jay'.
'of the man' becomes 'walker' (I can't explain this - if you can you should believe this answer much more).
'jay'+'walker'='JAY-WALKER'

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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