Not acknowledged (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not acknowledged</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 unowned that I've seen before include "Not possessed" , "not acknowledged" , "Not admitted to" , "Lacking a possessor" .)
(Another definition for unrecognised that I've seen is " Not acknowledged as valid".)