The most common and most likely answer to this crossword clue is the 6 letter word THEBAN
I've seen this crossword clue in The Guardian
T
H
E
B
A
N
More clues leading to the result THEBAN
- Old Greek sailor turning in as consequence
- From an ancient city, goddess cut in bronze
- Old Egyptian at that point holding sailor back
- British introduced to articles from Greece, perhaps
- The prohibition of an ancient city
- A specific prohibition for Oedipus?
- Creon, or the edict he issued?
- Old Greek article on prohibition
- Article and edict from Greek city
- Old Greek graduate stuck within that time
Buddy explains!

The straight part
We know that "from Greece, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case from greece, perhaps = theban.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.