The most common and most likely answer to this crossword clue is the 8 letter word DRAGOONS
I've seen this crossword clue in The Guardian
D
R
A
G
O
O
N
S
More clues leading to the result DRAGOONS
Buddy explains!
The straight part
We know that "mounted soldiers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mounted soldiers = dragoons.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 DRAGOONS mean?
DRAGOONS noun- A horse soldier; a cavalryman, who uses a horse for mobility, but fights dismounted.
- A carrier of a dragon musket.
- A variety of pigeon.
- To force (someone) into doing something; to coerce.
- To surrender (a person) to the fury of soldiers.