The most common and most likely answer to this crossword clue is the 6 letter word OREGON
I've seen this crossword clue in The Daily Telegraph
O
R
E
G
O
N
More clues leading to the result OREGON
- State's mineral aggregate almost exhausted
- Alternatively, I must go to northern US state
- From Reno, go travelling — north, to here
- State of ornateness is partly about self
- State some foregone conclusion
- State surrendered, not being ironclad
- Men, say, working for Pacific state
- State’s no-go area essentially rebuilt
- State predetermined to have no borders
- Superior to nitrogen, gold I state
Buddy explains!
The straight part
We know that "part of USA" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of usa = oregon.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.