The most common and most likely answer to this crossword clue is the 9 letter word EXECUTION
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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 EXECUTION mean?
EXECUTION noun- The act, manner or style of executing (actions, maneuvers, performances).
- The state of being accomplished.
- The act of putting to death or being put to death as a penalty, or actions so associated.
- The carrying into effect of a court judgment, or of a will.
- The formal process by which a contract is made valid and put into binding effect.
- The carrying out of an instruction, program or program segment by a computer.