Eco-friendly bark found in city (5,3)

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

'eco-friendly bark' is the wordplay.
I cannot quite see how this works, but
'eco' could be 'green' (as in eco-friendly) and 'green' is present in the answer.
'bark' could be 'bay' (baying is a kind of barking) and 'bay' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'found' is the link.

Can you help me to learn more?