A Four Corners state (4)
I believe the answer is:
utah
'a four corners state' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for utah that I've seen before include "Brigham Young state" , "State, Mormon settlement" , "The American Morman state" , "A hut for the Mormons, oddly" , "American location" .)