Sobriquet (8)
I believe the answer is:
nickname
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sobriquet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that sobriquet can be written as nickname)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nickname that I've seen before include "tag" , "Jocular moniker" , "Sobriquet" , "Familiar moniker" , "Familiar form of address" .)