Less burdensome (6)
I believe the answer is:
easier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">less burdensome</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 easier that I've seen before include "More effortless" , "More simple" , "More facile" , "Requiring less effort" , "Less complicated" .)