Abundance, glut (8)
I believe the answer is:
plethora
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">abundance</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">glut</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for plethora that I've seen before include "Surfeit" , "Excessively large amount" , "almost too much" , "Profusion" , "Large number" .)