Fully, wholly (8)
I believe the answer is:
entirely
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fully</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">wholly</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for entirely that I've seen before include "without qualification _" , "Completely and absolutely" , "Wholly, completly" , "Fully or absolutely" , "Wholly, totally" .)