Request for aid (6)
I believe the answer is:
appeal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">request for aid</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 appeal that I've seen before include "Legal procedure" , "A crustacean" , "Charity fund-raising" , "Request hearing of higher court" , "Charm in higher court?" .)