Vile smile (5)

I believe the answer is:
sneer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vile smile</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 sneer that I've seen before include "A scornful expression or remark" , "Smile contemptuously" , "Show contempt with scornful expression or words" , "Contemptuous gesture" , "Contemptuous look" .)