The most common and most likely answer to this crossword clue is the 10 letter word DISMOUNTED
I've seen this crossword clue in Financial Times
D
I
S
M
O
U
N
T
E
D
More clues leading to the result DISMOUNTED
Buddy explains!
The straight part
We know that "got off horse" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case got off horse = dismounted.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 DISMOUNTED mean?
DISMOUNTED verb- To (cause to) get off (something).
- To make (a mounted drive) unavailable for use.
- To come down; to descend.
- To throw (cannon) off their carriages.
- Having gotten off one's horse, or been removed from its usual mounting, as with a statue off its pedestal, a framed picture from a wall, or a chandelier hanging from a ceiling.