French city supports English company, they attract green travellers (3-5)

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

'french city supports english company' is the wordplay.
'french city' becomes 'tours' (I've seen this before).
'supports' says to put letters next to each other (bottom letters provide a support for the top ones).
'english' becomes 'E' (abbreviation).
'company' becomes 'co' (abbreviation).
'e'+'co'='eco'
'tours' after 'eco' is 'ECO-TOURS'.

Can you help me to learn more?