Area of authority (5)
I believe the answer is:
remit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">area of authority</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for remit that I've seen before include "Assigned task or area" , "Scope - send money" , "Transfer - area of authority" , "Relax; send (payment)" , "Send; brief" .)