The most common and most likely answer to this crossword clue is the 7 letter word ATLANTA
I've seen this crossword clue in The Times
A
T
L
A
N
T
A
More clues leading to the result ATLANTA
- Strongman almost crushes worker in Olympic venue
- Fabled kingdom is lacking a capital
- A time for Pastor in sole US city
- Fabled island, not island with a city, abroad
- Georgian city in the place of Los Angeles welcomes worker, say
- Capital cartel cannot pay regularly
- City worker going through map book endlessly
- Worker employed in Los Angeles, after a short time in state capital
- American capital network beset by American traders trashing America initially
- City worker included in short reference book
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 = atlanta.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.