Rule over (6)
I believe the answer is:
govern
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rule over</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 govern that I've seen before include "Rule or administer" , "Control, influence" , "Rule over or regulate" , "Control and direct the affairs of" , "Run" .)