The most common and most likely answer to this crossword clue is the 10 letter word BEEFEATERS
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More clues leading to the result BEEFEATERS
Buddy explains!

The straight part
We know that "Yeomen" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case yeomen = beefeaters.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 BEEFEATERS mean?
BEEFEATERS noun- An African bird of the genus Buphagus, which feeds on the larvae of botflies hatched under the skin of oxen, antelopes, etc.
- One who eats beef; a large, fleshy person; a well-fed servant.