Alias (7,4)
I believe the answer is:
assumed name
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">alias</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for assumed name that I've seen before include "Alias" , "I may appear under this" .)