Brand X
I believe the answer is:
generic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">brand x</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for generic that I've seen before include "Applicable to an entire class or group" , "Not specific; of a class" , "(Of drugs) having no brand name" , "Unspecific" , "cheap drug" .)