Look displeased (5)
I believe the answer is:
frown
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">look displeased</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for frown that I've seen before include "Facial expression of dislike or concentration" , "Look displeased" , "Sullen look" , "Furrow one's brow" , "Disapproving look" .)