Not tested (7)
I believe the answer is:
untried
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not tested</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 untried that I've seen before include "Not yet experienced" , "virgin" , "inexperienced" , "not yet proved reliable" , "Intrude (anag.)" .)