Wise men arrange treats for judge (10)
I believe the answer is:
magistrate
'for judge' is the definition.
(synonyms)
'wise men arrange treats' is the wordplay.
'wise men' becomes 'magi' (the three wise men from the nativity).
'arrange' indicates an anagram.
'treats' anagrammed gives 'strate'.
'magi'+'strate'='MAGISTRATE'
(Other definitions for magistrate that I've seen before include "Court head" , "Capital of Ethiopia" , "Dispenser of justice" , "Court officer" , "Court official" .)