City on the Rhône
I believe the answer is:
lyon
'city on the rhone' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lyon that I've seen before include "City of south-central France" , "French city on the Rhone" , "River port of southeast France" , "River port, capital of the Rhone department" , "City where the Saone joins the Rhone" .)