Grinned (6)
I believe the answer is:
smiled
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grinned</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 smiled that I've seen before include "Looked happy" , "Assumed facial expression indicating pleasure" , "drank whisky" , "Showed pleasure" , "Grinned" .)