Have possession of (3)
I believe the answer is:
own
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">have possession of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for own that I've seen before include "Have in one's possession" , "Be in legal possession of (3)" , "Keep" , "Possess or confess" , "Possess - recognise - admit" .)