The most common and most likely answer to this crossword clue is the 8 letter word ASUNCION
I've seen this crossword clue in The Guardian
A
S
U
N
C
I
O
N
More clues leading to the result ASUNCION
- Fashion icon pursuing a star’s capital
- Ace setter against investing island capital
- A descendant tours one foreign capital
- A northern cousin seen out in South American capital
- Celts, leaving consultancies, organised capital
- Capital city that could become an US icon
- A newspaper I love in outskirts of Chilean capital
- About to enter a small tie-up, getting capital
- Like marriage, getting cold in the capital
Buddy explains!
The straight part
We know that "foreign capital" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case foreign capital = asuncion.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.