The most common and most likely answer to this crossword clue is the 8 letter word CABRIOLE
I've seen this crossword clue in The Daily Telegraph
C
A
B
R
I
O
L
E
More clues leading to the result CABRIOLE
Buddy explains!

The straight part
We know that "Leap" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case leap = cabriole.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 CABRIOLE mean?
CABRIOLE noun- A type of furniture leg used in certain ornate styles of furniture such as Queen Anne, having a double curve resembling the leg of an animal.