Not good (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not good</span>' is the definition.<br/ ><span class="explanation-format__explanation">(bad is the opposite of good)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bad that I've seen before include "Of poor quality" , "Substandard" , "Rotten, evil" , "Severe; of low standard" , "SECOND HALF OF 16" .)