The most common and most likely answer to this crossword clue is the 9 letter word NEWCASTLE
I've seen this crossword clue in The Guardian
N
E
W
C
A
S
T
L
E
More clues leading to the result NEWCASTLE
- Modern fortification somewhere in Northeast England
- Actually, its fortress was erected in 1080!
- Can one settle comfortably outside city?
- City, inexperienced, play defensively
- A Celt’s maybe emerging from this English city
- Recently acquired players, wingers from Lausanne City
- Lodge walls can initially affect course
- City that may be built when the incoming waves have been destructive?
- Place: St Lawrence
- Keep up-to-date moving ahead in English city
Buddy explains!

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