The most common and most likely answer to this crossword clue is the 8 letter word MUSTANGS
I've seen this crossword clue in The Daily Telegraph
M
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More clues leading to the result MUSTANGS
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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 MUSTANGS mean?
MUSTANGS noun- A small, hardy, naturalized (feral) horse of the North American west.
- A merchant marine who joined the U.S. Navy as a commissioned officer during the American Civil War.
- (generalized) A commissioned officer who started military service as an enlisted person.