Gape (4)
I believe the answer is:
yawn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gape</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that gape can be written as yawn)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for yawn that I've seen before include "Show tiredness/boredom" , "Show boredom" , "Bored sign" , "Show one is tired or bored" , "Open mouth wide" .)