The most common and most likely answer to this crossword clue is the 10 letter word PROCEEDING
I've seen this crossword clue in The Guardian
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More clues leading to the result PROCEEDING
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 PROCEEDING mean?
PROCEEDING verb- To move, pass, or go forward or onward; to advance; to carry on
- To pass from one point, topic, or stage, to another.
- To come from; to have as its source or origin.
- To go on in an orderly or regulated manner; to begin and carry on a series of acts or measures; to act methodically
- To be transacted; to take place; to occur.
- (of a rule) To be applicable or effective; to be valid.
- To begin and carry on a legal process.
- To take an academic degree.
- The act of one who proceeds, or who prosecutes a design or transaction
- An event or happening; something that happens
- (always in plural) A published collection of papers presented at an academic conference, or representing the acts of a learned society.
- Progress or movement from one thing to another.
- A measure or step taken in a course of business; a transaction
- Any legal action, especially one that is not a lawsuit.