The most common and most likely answer to this crossword clue is the 6 plus 4 letter word PUERTO RICO
I've seen this crossword clue in The Guardian
P
U
E
R
T
O
R
I
C
O
More clues leading to the result PUERTO RICO
- Endless corruption sadly engulfs European island
- Top courier lost somewhere in the Antilles
- Ornate picture frames or nothing in US territory
- PR firm’s heartless error put unstable international leader ahead
- Raging corruption mostly enveloping European or US territory
- Our price to travel around a foreign island
- Island new to croupier
- Top courier redirected somewhere in Caribbean
Buddy explains!
The straight part
We know that "US territory" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case us territory = puerto rico.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.