Plentiful, copious (8)
I believe the answer is:
prolific
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">plentiful</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">copious</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for prolific that I've seen before include "Intellectually productive" , "Producing many works" , "Copious" , "Producing fruit in abundance" , "Abundantly productive" .)