The most common and most likely answer to this crossword clue is the 5 letter word ARRAN
A
R
R
A
N
More clues leading to the result ARRAN
- King visiting Irish islands, or a Scottish one
- Small island administered by a king or queen?
- A right reverend on an island off the Scottish coast
- Island administered under Sark that’s out of bounds?
- A Republican administered Scottish island
- Artist returned and administered the island
- Article about bishop assigned to a Scottish island
- Sort of woolly bears run island
- Island is notorious if temperature drops
Buddy explains!

The straight part
We know that "a Scottish one" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a scottish one = arran.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.