The most common and most likely answer to this crossword clue is the 8 letter word HONOLULU
I've seen this crossword clue in The Daily Telegraph
H
O
N
O
L
U
L
U
More clues leading to the result HONOLULU
- State capital almost calm during brief salute
- Port kept in house: hardly a great example
- Member of Steps, Beatle wife, 60s diva assembled somewhere in C Pacific
- Where hula dancer might perform, on well after backing singer
- Honour singer if, as they say, you are leaving capital
- Port house, northern, old, something outstanding
- Hotel singer keeps working round island capital
- American port made from honey initially overwhelmed pop star
- US city to endlessly acclaimScottish singer
- Island’s city house, no outstandingly impressive thing
Buddy explains!

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