John Wayne, by birth
I believe the answer is:
iowan
'john wayne by birth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for iowan that I've seen before include "Someone from the Midwest - a wino? (anag)" , "US resident" , "American" , "One from Des Moines perhaps" , "Midwesterner" .)