The most common and most likely answer to this crossword clue is the 6 letter word KRAKOW
I've seen this crossword clue in Financial Times
K
R
A
K
O
W
More clues leading to the result KRAKOW
- Work set up around a king in Polish city
- City’s keeper initially not prepared to accept defeat
- Yank regularly featuring in opus about Polish city
- Uplifting piece about human spirit somewhere in Eastern Europe
- Pair of vessels from south reaches European city
- Two vessels capsized in Polish city
- Two vessels retreating to European city
Buddy explains!
The straight part
We know that "Polish city" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case polish city = krakow.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.