The most common and most likely answer to this crossword clue is the 4 plus 5 letter word TAXI STAND
I've seen this crossword clue in The Guardian
T
A
X
I
S
T
A
N
D
Buddy explains!

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