The most common and most likely answer to this crossword clue is the 4 letter word IONA
I've seen this crossword clue in The Daily Telegraph
I
O
N
A
More clues leading to the result IONA
- Speaker’s claim to possess a small Scottish island
- Northern tourist destination in conservation area
- Somewhat paranoid about where Scots live
- It’s said I possess a bit of Scottish land
- Billionaire’s acquired island
- Island in conservation area
- Holy Island regularly ignored His own law
- One finds no sodium under here off the Scottish coast
- Announce I own a place for spiritual retreats
- Isle of Capri on alert
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.