Comic's straight man (6)
I believe the answer is:
stooge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">comic's straight man</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stooge that I've seen before include "Partner who is the butt of comedian's joke" , "Comedian's sidekick" , "Toes go wrong for the scapegoat" , "Comic's straight man" , "Yes-man" .)