Pleased with oneself (4)
I believe the answer is:
smug
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pleased with oneself</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for smug that I've seen before include "Showing excessive self-pride" , "Self-satisfied and vain" , "Full of oneself" , "Prim" , "Smirking" .)