The most common and most likely answer to this crossword clue is the 8 letter word HICCOUGH
I've seen this crossword clue in Financial Times
H
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More clues leading to the result HICCOUGH
Buddy explains!
The straight part
We know that "Temporary setback" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case temporary setback = hiccough.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 HICCOUGH mean?
HICCOUGH noun- A spasm of the diaphragm, or the resulting sound.
- (by extension) Any spasm or sudden change.
- A minor setback.
- To produce a hiccup; have the hiccups.
- To say with a hiccup.
- To produce an abortive sound like a hiccup.