The most common and most likely answer to this crossword clue is the 8 letter word REFEREED
I've seen this crossword clue in The Guardian
R
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More clues leading to the result REFEREED
Buddy explains!

The straight part
We know that "Was judge" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case was judge = refereed.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 REFEREED mean?
REFEREED verb- To act as a referee.
- Said of articles or books that have undergone peer review
- Said of a journal whose articles are submitted to peer review