Good name, informally (3)
I believe the answer is:
rep
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">good name informally</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 rep that I've seen before include "Travelling salesman" , "Theatre; fabric; salesman" , "Sort of theatre" , "Material for curtains" , "Corded fabric" .)