Rarebit put out for judge (7)
I believe the answer is:
arbiter
'for judge' is the definition.
(I've seen this before)
'rarebit put out' is the wordplay.
'put out' indicates an anagram.
'rarebit' is an anagram of 'ARBITER'.
(Other definitions for arbiter that I've seen before include "Mediator or referee" , "One decides in disputes" , "One judges a disputed issue" , "One has the authority to resolve disputes" , "Decision maker" .)