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

The Prosna is a river in central Poland, a tributary of the Warta river (near Pyzdry), with a length of 217 kilometres (28th longest) and the basin area of 4,925 km2 (all in Poland). ==Towns== ...
Found on
http://en.wikipedia.org/wiki/Prosna

Prosna is a cultivated variety of potato.
Found on
http://www.probertencyclopaedia.com/browse/QP.HTM
No exact match found.