The noble art? (6)
I believe the answer is:
boxing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the noble art?</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 boxing that I've seen before include "Ring sport" , "Fighting with the fists" , "-- Day; -- glove" , "Packer's job" , "Pugilism; a Day" .)