The most common and most likely answer to this crossword clue is the 10 letter word MARSEILLES
I've seen this crossword clue in The Daily Telegraph
M
A
R
S
E
I
L
L
E
S
More clues leading to the result MARSEILLES
- Port the old lady perhaps picked up
- Topless French girls supporting Planet Earth in French port
- Anglicised French port‘s state, for example, broadcast
- Potential for real smiles as port becomes visible
- Spoil visits round unhealthy place in Provence
- Mother travels, as we say, to port, as we say
- Landing in another world, look around wicked 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 = marseilles.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.