Remainder; relax (4)
I believe the answer is:
rest
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">remainder</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that remainder can be written as rest)</span><br/ ><br/ >'<span class="explanation-format__original">relax</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(to relax is to have a rest)</span><br/ ><br/ ></span>
(Other definitions for rest that I've seen before include "Change is as good as this, they say" , "Calm" , "Remainder; cease work" , "Others; relax" , "Relax with residue" .)