The most common and most likely answer to this crossword clue is the 10 letter word ARBITRATOR
I've seen this crossword clue in The Daily Telegraph
A
R
B
I
T
R
A
T
O
R
More clues leading to the result ARBITRATOR
- Judge savaged scoundrel after artillery backed ordinary soldiers
- Supporter’s over grass — one goes to top referee
- Referee and one supporter turned renegade, we hear
- Trio at bar getting disorderly — right for one to intervene judiciously?
- Take back support when it comes before informant or judge
- Judge story-teller not to have started with a little in reserve
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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 ARBITRATOR mean?
ARBITRATOR noun- A person to whom the authority to settle or judge a dispute is delegated.