The most common and most likely answer to this crossword clue is the 6 letter word NAGOYA
I've seen this crossword clue in The Times
N
A
G
O
Y
A
More clues leading to the result NAGOYA
- Retiring, an artist in Japanese city
- City of Northern Aragón’s premier artist
- Article written up on artist in Japanese city
- Knight meeting a Spanish painter in Japanese city
- Name a painter from somewhere in Japan
- A walk in any random port in Japan
- . City goes one up on painter
- City boy, not born among tribals
- One under terrible agony in the city
- Article about painter depicting city in Japan
Buddy explains!

The straight part
We know that "city in Japan" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case city in japan = nagoya.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.