The most common and most likely answer to this crossword clue is the 5 letter word HANOI
H
A
N
O
I
More clues leading to the result HANOI
- Chinese switch positions in capital
- Greeting with a number being hugged in foreigncapital
- In this year one receives no capital
- Hotel on island raised capital out East
- Island hotel put up capital
- Afghan oilfield yielding capital
- City giving Hearts a goalkeeper?
- Reversal for monastic centre following end of faith in Asian capital
- Have noises reduced by half in this city?
- A number trapped by hail in foreign capital
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 = hanoi.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.