The most common and most likely answer to this crossword clue is the 3 plus 3 plus 3 letter word HIT AND RUN
I've seen this crossword clue in The Daily Telegraph
H
I
T
A
N
D
R
U
N
Buddy explains!
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 HIT AND RUN mean?
HIT AND RUN noun- The crime of causing an accident, as with a motor vehicle, and leaving without acknowledging responsibility.
- A play in baseball where the baserunners leave their base before the batter hits the ball, assuming that the batter will in fact hit the ball and this will give them an advantage.
- The military technique of attacking one place and then quickly moving to another before defenders can react.
- Of, pertaining to, or being a hit and run.