The most common and most likely answer to this crossword clue is the 7 letter word CAYENNE
I've seen this crossword clue in The Times
C
A
Y
E
N
N
E
More clues leading to the result CAYENNE
- Longing to tuck into kind of sugar and spice
- Staff investing money, foreign capital
- Rod contains desire for hot stuff
- Capital letters in centre of banknote read out?
- Rock garden ends, we hear, in South American capital
- Spice from island in French north-east
- Seasoning accountant had fancy for not edible, originally
- Currency invested in support for plant, a hot one
- Capital: money stolen by staff
- Hot stuff, a couple of letters to the auditor?
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 = cayenne.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.
What does CAYENNE mean?
CAYENNE noun- Cayenne pepper.