The most common and most likely answer to this crossword clue is the 5 letter word AMMAN
A
M
M
A
N
More clues leading to the result AMMAN
- In the morning fellow is found in capital city
- Capital of Vietnam? Map’s upside down
- District magistrate in ME capital
- Morning person builds city
- A bloke hoarding millions in the capital
- Male embraced by a male? Capital!
- Austen’s gutted about one of her titles missing its first capital
- Same hearty fellow in capital
- Capital infusion in Tammany Hall, say
- City stiffled by Tottenham manager
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 = amman.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.