The most common and most likely answer to this crossword clue is the 6 letter word HELENA
I've seen this crossword clue in The Guardian
H
E
L
E
N
A
More clues leading to the result HELENA
- Girl discovered in brothel, enamoured
- One who launched ships with a lover of Demetrius
- Ambassador has lie-ins regularly with a woman
- Woman portrayed in some Brueghel enamels
- The man nearly advanced on a woman
- Man’s name in field with island saint
- Woman who was beautiful, ace, capital!
- Man with elan, goes round state capital
- That guy Leonard goes over a U.S. capital
Buddy explains!
The straight part
We know that "island saint" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case island saint = helena.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.