Realm of influence (5)
I believe the answer is:
ambit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">realm of influence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ambit that I've seen before include "Range, scope" , "Scope, extent, or bounds of something" , "round" , "Range - surroundings" , "Circuit, compass" .)