Abate, slacken (3,2)
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">abate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that abate can be written as let up)</span><br/ ><br/ >'<span class="explanation-format__original">slacken</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for let up that I've seen before include "Pause, respite" , "Slack off" , "stop" , "End of crisis" , "Pause (in tiring task)" .)
(Another definition for letup that I've seen is " relief".)