Promoter (7)
I believe the answer is:
sponsor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">promoter</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 sponsor that I've seen before include "Pledge money" , "One who backs" , "Promoter, godparent" , "Godparent at a baptism" , "One financially supporting an activity" .)