Judge's rare outburst interrupted by boring part (7)
I believe the answer is:
arbiter
'judge's' is the definition.
(I've seen this before)
'rare outburst interrupted by boring part' is the wordplay.
'outburst' indicates anagramming the letters (I've seen this in other clues).
'interrupted by' indicates putting letters inside.
'boring part' becomes 'bit' (both mean a piece of something. I am not sure about the 'boring' bit.).
'rare' anagrammed gives 'arer'.
'arer' enclosing 'bit' is 'ARBITER'.
Can you help me to learn more?
(Other definitions for arbiter that I've seen before include "One who settles disputes" , "He'll decide" , "Judge - mediator" , "expert" , "One judges a disputed issue" .)