The most common and most likely answer to this crossword clue is the 6 letter word DUBLIN
I've seen this crossword clue in Independent
D
U
B
L
I
N
More clues leading to the result DUBLIN
- Style shown by Labour's leader in European city
- Capital said to be showin’ 100% appreciation
- Hideous new build generates capital …
- Record new words for Labour leader in capital
- Zero return after call for capital
- Knight at home touring large European capital
- Call policy restricted in European capital
- Love pal that’s raised capital
- Build new Northern capital
- Capital friend raises with zero returns
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 = dublin.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.