Surpass, eclipse (5)
I believe the answer is:
outdo
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">surpass</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that surpass can be written as outdo)</span><br/ ><br/ >'<span class="explanation-format__original">eclipse</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for outdo that I've seen before include "Surpass, go one better than" , "Cap" , "Br superior to (someone)" , "Defeat" , "Get the better of" .)