"Why not!" (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">why not</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 sure that I've seen before include "stable" , "Completely certain" , "Certain, confident" , "of course" , "Feeling no doubt" .)
(Other definitions for lets that I've seen before include "Leases" , "Yes" , "Allows or causes to" , "Rents out or allows" , "Permits" .)
(Other definitions for both that I've seen before include "couple" , "Each of two (alternatives)" , "Two considered together" , "The one and the other" , "The two (things)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">why not?</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>