Arbiter (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arbiter</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 referee that I've seen before include "Umpire; arbitrator" , "One who decides" , "Sports adjudicator" , "Judge" , "Official who ensures fair play" .)
(Other definitions for rattler that I've seen before include "Excellent example" , "North American pit viper" , "old crate" , "Dangerous snake" , "US snake (colloq.)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arbiter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(a judge arbitrates)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for judge that I've seen before include "Deem; arbiter" , "Assess" , "Arbitrator" , "Adjuicator" , "rule" .)