The most common and most likely answer to this crossword clue is the 8 letter word SABOTEUR
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More clues leading to the result SABOTEUR
- Boat sure to be damaged by him?
- Hacker, perhaps, regrets getting upset about a program
- Regret turning back on footwear vandal
- Sure boat at sea is a wrecker?
- Sure boat at sea is a destroyer
- One that’s ruined our best bit of acting?
- Boast about European Union, right, for one could wreck things
- Wrecker rues boat wreck
- Backstreet in Paris leading to Belgium when one has bad intentions
- Regret coming back to boast about being someone who blows things up
Buddy explains!

The straight part
We know that "vandal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vandal = saboteur.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 SABOTEUR mean?
SABOTEUR noun- A person who intentionally causes the destruction of property in order to hinder the efforts of his/her enemy.