Crossword clue: a river that rises in eastern kansas and flows eastward into oklahoma to become a tributary of the arkansas river
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
neosho
6 letters
wn-def
a river that rises in eastern Kansas and flows eastward into Oklahoma to become a tributary of the Arkansas River