The most common and most likely answer to this crossword clue is the 11 letter word LEAPFROGGED
I've seen this crossword clue in The Sunday Telegraph
L
E
A
P
F
R
O
G
G
E
D
Buddy explains!

The straight part
We know that "Vaulted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vaulted = leapfrogged.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 LEAPFROGGED mean?
LEAPFROGGED verb- To jump over some obstacle, as in the game of leapfrog.
- To overtake.
- To progress.
- Of a case: to appeal or allow to be appealed directly to a supreme court, bypassing an intermediate appellate court.
- To advance by engaging the enemy with one unit while another moves further forward.