Gratify, make happy (7)
I believe the answer is:
satisfy
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">gratify</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">make happy</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for satisfy that I've seen before include "Be good enough for" , "Quench, sate" , "To convince" , "Make contented or pleased" , "Make contented, fill need" .)