Give a nickname to (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">give a nickname to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dub that I've seen before include "Give nickname, knighthood, to" , "Knight (someone) with a sword" , "Label, name" , "Add sound effects or music" , "Raise to knighthood" .)