The most common and most likely answer to this crossword clue is the 4 letter word SUEZ
S
U
E
Z
More clues leading to the result SUEZ
- Casual geezer repeatedly showing heart somewhere in Egypt
- Variable support for petition in strategic area abroad
- An Olympian retired somewhere in Egypt
- A canal God recalled
- Take action against unknown in mid-50s, the centre of a crisis
- Famous crisis when Greek god goes north
- God! Escalating crisis for Britain
- Take legal action against extreme character in port
- The rise of Jupiter or the fall of Eden?
- Little girl facing the unknown in a place of great crisis
Buddy explains!

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