Major Midwest river (4)
I believe the answer is:
ohio
(Other definitions for ohio that I've seen before include "US state, capital Columbus" , "American region" , "American river" , "One of the American states" , "Supporting framework" .)
I believe the answer is:
ohio
(Other definitions for ohio that I've seen before include "US state, capital Columbus" , "American region" , "American river" , "One of the American states" , "Supporting framework" .)