1) European waterway 2) European watercourse 3) European river 4) Polish watercourse 5) Polish waterway 6) Polish river 7) River in Poland 8) River into the Vistula 9) River in Europe 10) Waterway in Europe 11) Waterway in Poland 12) Watercourse in Europe 13) Watercourse in Poland Found on https://www.crosswordclues.com/clue/narew