The most common and most likely answer to this crossword clue is the 5 letter word OSAKA
I've seen this crossword clue in The Daily Telegraph
O
S
A
K
A
More clues leading to the result OSAKA
- City lack passion going forward, oddly? The very opposite
- A king entering South Africa after old Japanese city
- Japanese port’s extremely obvious alias
- Does walk, say, regularly, in Japanese city
- Sailor otherwise designated in Japanese city
- Goes back regularly to a place in Japan
- Kansai location huge — there’s another name for it
- Extremely obvious alias used in Honshu port
- Hence, perhaps, Japanese sailor: his other name is?
- A king brought by seaman to a port
Buddy explains!
The straight part
We know that "foreign port" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case foreign port = osaka.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.