The most common and most likely answer to this crossword clue is the 3 plus 7 letter word NEW ENGLAND
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More clues leading to the result NEW ENGLAND
- Great Falls location
- No good territory for Scot to occupy — so he emigrates to here?
- Jacob, for example splitting two notes on organ in part of US
- Notes describing sheep liver, perhaps, somewhere in US
- What was founded in the North East, initially?
- Part of US where last of mountain sheep is seen with no organ to produce hormones
- Glenn ad in part of north-eastern US
- States part that’s a young country
Buddy explains!

The straight part
We know that "part of US" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case part of us = new england.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.