The most common and most likely answer to this crossword clue is the 12 letter word INTERLOCUTOR
I've seen this crossword clue in The Guardian
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More clues leading to the result INTERLOCUTOR
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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 INTERLOCUTOR mean?
INTERLOCUTOR noun- A person who takes part in dialogue or conversation.
- A man in the middle of the line in a minstrel show who questions the end men and acts as leader.
- An interlocutory judgement or sentence.
- A decree of a court.