The most common and most likely answer to this crossword clue is the 8 letter word HEBRIDES
I've seen this crossword clue in Financial Times
H
E
B
R
I
D
E
S
More clues leading to the result HEBRIDES
- Men pulling trains, perhaps? You’ll find them in Scotland
- His Excellency joining newly-weds in Scottish isles
- Both outsiders reside abroad in location off mainland Scotland
- Man with hens, possibly in Scottish region?
- Theme of Jews out West admitting identity
- Islands men as women wed?
- Jews out west admitting identity
- She grooms partners for the Western Isles
- Hot English women tying the knot somewhere in Scotland?
- Islands‘ male union members
Buddy explains!
The straight part
We know that "location off mainland Scotland" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case location off mainland scotland = hebrides.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.