European waterway (4)
(Other definitions for rhone that I've seen before include "River at Avignon and Arles" , "One following long course" , "River running through France to the Med" , "River flowing through Lake Geneva" , "Fr. river and wine" .)
(Other definitions for rhine that I've seen before include "Great river that flows through Germany" , "Great European river with Lorelei Rock" , "Ring river (Wagner)" , "Flower" , "River, rising in Switzerland and flowing into the North Sea" .)
(Other definitions for elbe that I've seen before include "German banker" , "River flowing through Dresden and Hamburg" , "Current" , "It flows through Germany" , "Dresden and Hamburg's river" .)