Answer to the old riddle "What's round on the ends and high in the middle?"
I believe the answer is:
ohio
'answer to the old riddle what's round on the ends and high in the middle?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ohio that I've seen before include "State of the union" , "American region" , "Turning engine part" , "American river" , "Midwest US state" .)