Succeed, flourish (7)
I believe the answer is:
prosper
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">succeed</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">flourish</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that flourish can be written as prosper)</span><br/ ><br/ ></span>
(Other definitions for prosper that I've seen before include "like Merimee, nominally" , "Thrive, boom" , "Succeed, flourish" , "Make good" , "Go well" .)