Vin rouge? It's not for consumption when driving on public roads (3,6)

'public roads' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'vin rouge? it's not for consumption when driving on' is the wordplay.
I cannot quite see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is present in the answer.
'on' could be 're' ('on' can be mean 'with reference to') and 're' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?