Charge in low and bolt (4)
I believe the answer is:
flee
'bolt' is the definition.
(I know that bolt is a more specific form of flee)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for flee that I've seen before include "Abscond" , "rush" , "Take to one's heels" , "Maybe escape" , "Leave" .)