Legal excuse (5)
I believe the answer is:
alibi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">legal excuse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for alibi that I've seen before include "Legal term from the Latin 'elsewhere'" , "Evidence of (or excuse for) being somewhere else at the time" , "Making excuse" , "Reason often given to exculpate someone" , "Proof of not being at crime site" .)