"Birthplace of Aviation” (4)

I believe the answer is:

ohio

'birthplace of aviation' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for ohio that I've seen before include "American state, capital Columbus" , "E. central US state" , "state of America" , "State of the union" , "American river" .)

I've seen this clue in The Wall Street Journal.

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