The most common and most likely answer to this crossword clue is the 2 plus 7 letter word ST ANDREWS
I've seen this crossword clue in The Times
S
T
A
N
D
R
E
W
S
More clues leading to the result ST ANDREWS
- Want dress jazzed up for swingers' club?
- Bears circling outskirts of remote west Scottish town Extraneous underlining removed.
- Sports venue broadcasting darts news…
- Rising leader of Scottish Nats tied, bound in famous club for swingers
- Son also wearing tartan trousers in university town
- For starters, sack traffic wardens randomly? It’s popular among drivers
- Almost suffer getting pulled before start of sandwich course
- Laurel presented by wife in new Reds sporting venue
Buddy explains!

The straight part
We know that "swingers' club?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case swingers' club? = st andrews.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.