Sulky expression (4)
I believe the answer is:
pout
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sulky expression</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pout that I've seen before include "shows disappointed face" , "Sullen expression" , "Moue - sulk" , "Look miffed" , "Sulky (or sexy?) expression" .)