The most common and most likely answer to this crossword clue is the 4 plus 2 plus 4 plus 5 letter word TAKE TO ONES HEELS
I've seen this crossword clue in The Times
T
A
K
E
T
O
O
N
E
S
H
E
E
L
S
Buddy explains!
The straight part
We know that "Bolt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bolt = take to ones heels.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.