The most common and most likely answer to this crossword clue is the 7 letter word ONTARIO
I've seen this crossword clue in Independent
O
N
T
A
R
I
O
More clues leading to the result ONTARIO
- Canadian province supported by cheers at port city
- Over moon securing new pitch for province
- Region of note air pilot regularly visited
- Old train rattling over old Canadian province
- Working port on banks of Tarragona lake
- North American province, not a different South American city
- . Working space satellite capturing salt lake, as an example
- Performing composition about a lake
- Spin one observed in nucleus of fluorine, atomic number 9
- Ramshackle train entering middle of poor province
Buddy explains!

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.