The most common and most likely answer to this crossword clue is the 6 letter word RIMINI
I've seen this crossword clue in Financial Times
R
I
M
I
N
I
More clues leading to the result RIMINI
- Italian resort: in one south of border
- Car from Providence somewhere in Italy
- Equipment mostly put on car in Italian port
- Runs car round one Italian resort
- International wearing right dress for an Italian resort
- 60s blocks initially revolutionary in Italian city
- Antrim inimitably offers famous place on coast
- Part of September I’m in Ibizan resort
- Coastal resort that has some edge in India
Buddy explains!

The straight part
We know that "Italian port" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case italian port = rimini.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.