Contributor, giver (5)
I believe the answer is:
donor
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">contributor</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">giver</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that giver can be written as donor)</span><br/ ><br/ ></span>
(Other definitions for donor that I've seen before include "Organ giver?" , "One giving something" , "Someone providing" , "Charitable giver" , "One who gives, maybe blood" .)