The most common and most likely answer to this crossword clue is the 4 letter word FASH
F
A
S
H
Buddy explains!
The straight part
We know that "Trouble in the Gorbals" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case trouble in the gorbals = fash.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.
What does FASH mean?
FASH noun- A worry; trouble; bother.
- To worry; to bother, annoy.
- To trouble oneself; to take pains.
- A fascist, a member of the far-right.
- (plural) The far-right, especially violent far-right demonstrators, collectively.
- To make something fascist.