Act without words (4)
I believe the answer is:
mime
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">act without words</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 mime that I've seen before include "Copy, ape" , "Theatrical technique" , "Tell a story through body movements" , "Performance without words" , "Silent artform" .)