The most common and most likely answer to this crossword clue is the 9 letter word MANDOLINS
I've seen this crossword clue in The Daily Telegraph
M
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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 MANDOLINS mean?
MANDOLINS noun- A stringed instrument and a member of the lute family, having eight strings in four courses, frequently tuned as a violin, and with either a bowl-shaped back or a flat back
- A kitchen tool used for slicing vegetables (usually spelled mandoline)
- An RAF World War II code name for patrols to attack enemy railway transport and other ground targets