Part of America periodically using just cash (4)

I believe the answer is:

utah

I'm a little stuck... Click here to teach me more about this clue!

'part of america' is the definition.
(I know that Utah is part of United States of America)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for utah that I've seen before include "A hut marks the State" , "State of Western USA" , "Mormons are found here in a hut" , "The American Mormon state" , "Brigham Young's state" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.