Actual existence (4)
I believe the answer is:
esse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">actual existence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for esse that I've seen before include "Fundamental nature (philosophy)" , "Sees (anag.)" , "Dried fruit" , "Essential nature (philosophy)" , "Actual existence" .)