Self-pleased (4)
I believe the answer is:
smug
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">self-pleased</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 "irritating expression" , "Self-righteous" , "Smirking" , "Showing excessive self-pride" , "goody-goody" .)