The most common and most likely answer to this crossword clue is the 9 letter word EVALUATES
I've seen this crossword clue in The Daily Telegraph
E
V
A
L
U
A
T
E
S
More clues leading to the result EVALUATES
Buddy explains!

The straight part
We know that "Judges" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case judges = evaluates.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 EVALUATES mean?
EVALUATES verb- To draw conclusions from examining; to assess.
- To compute or determine the value of (an expression).
- To return or have a specific value.