Crossword clue: a major european river carrying more traffic than any other river in the world; flows into the north sea

The most common answer is rhine (5 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

rhine 5 letters wn-def

a major European river carrying more traffic than any other river in the world; flows into the North Sea