The most common and most likely answer to this crossword clue is the 5 letter word ANGUS
I've seen this crossword clue in Independent
A
N
G
U
S
More clues leading to the result ANGUS
- West Ham’s to drop useless Scot
- Breed of cattle nibbling peripherally in Australia
- Grazier originally brought in an American breed of cattle
- An American taking in golf in Scottish region
- Scottish council keep us in suspense, dismissing leader
- Scot showing some Caledonian gusto
- Scotsman conveys message from Cockney murderers wanting death penalty
- Neat Scottish chap‘s sung a medley
- Scotsman’s no good in Australia
- Scotsman in endless pain? Not I
Buddy explains!

The straight part
We know that "Scotsman" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scotsman = angus.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.