One who settles disputes (7)
I believe the answer is:
arbiter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one who settles disputes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for arbiter that I've seen before include "He'll decide" , "One judges a disputed issue" , "Judge, adjudicator" , "Judge to decide a disputed issue" , "One settling disputes" .)