The most common and most likely answer to this crossword clue is the 9 letter word DERRIÈRES
I've seen this crossword clue in Independent
D
E
R
R
I
Ã
ˆ
R
E
S
More clues leading to the result DERRIÈRES
Buddy explains!
The straight part
We know that "those upon the saddle?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case those upon the saddle? = derriÈres.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 DERRIÈRES mean?
DERRIÈRES noun- (chiefly humorous) bottom, bum