Reigns (5)

I believe the answer is:
rules
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reigns</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rule' can be a synonym of 'reign')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rules that I've seen before include "strips" , "is supreme, OK?" , "Conventions" , "Governs; regulations" , "Laws; draws lines" .)