Complacent (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">complacent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(smug can mean complacent or self-satisfied)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for smug that I've seen before include "Smirking" , "Irritatingly pleased with oneself" , "Unpleasantly complacent" , "Self-satisfied about gums" , "Self-satisfied, complacent" .)
(Other definitions for cocky that I've seen before include "Full of oneself" , "Boldly conceited" , "Made observation" , "Impudently self-assured" , "Remove errors from (program)" .)