Wicked, sinful (3)
I believe the answer is:
bad
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">wicked</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">sinful</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for bad that I've seen before include "Evil, below standard or off" , "Stinking" , "Severe; of low standard" , "Rotten, evil" , "Substandard" .)