Excuse, exempt from (3,3)
I believe the answer is:
let off
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">excuse</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that excuse can be written as let off)</span><br/ ><br/ >'<span class="explanation-format__original">exempt from</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for let off that I've seen before include "Excuse or release of" , "Spare" , "Go easy on" , "Discharge (a firework)" , "Allow to escape punishment" .)