The most common and most likely answer to this crossword clue is the 7 letter word YAOUNDE
I've seen this crossword clue in Financial Times
Y
A
O
U
N
D
E
More clues leading to the result YAOUNDE
- One 22D wasted going round university in African capital
- Over a year rearing daughter in a foreign capital
- About to eliminate resistance in the old African capital
- Retiring for good, pupil leaves English school for African capital
- ‘Queer old Dean’ and case of under-secretary’s capital
- African capital exciting you, and capital in Europe
- Dane you found wandering around in the capital
- Capital of Yemen’s founder edges away with American capital
- Article penned by solver: end translated in African capital
- Scoring cocaine, you dance madly in African city
Buddy explains!

The straight part
We know that "capital" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case capital = yaounde.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.