The most common and most likely answer to this crossword clue is the 5 letter word CAIRO
I've seen this crossword clue in The Guardian
C
A
I
R
O
More clues leading to the result CAIRO
- One in vehicle going to old African city
- Nothing for Poles in Australian city or Egyptian one
- Capital in company affected by inflation?
- Atmosphere in firm in the capital
- Appearance in county’s principal city
- City starts to construct an international relations office
- Atmosphere within company is capital
- Unfinished heap of stones round major Egyptian site
- Constant atmosphere round capital
- Capital state openly invested in company
Buddy explains!

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.