Body language (13)
I believe the answer is:
gesticulation
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">body language</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gesticulation that I've seen before include "The adding of emphasis by moving arms or hands" , "Hand signalling" , "Hand signal?" , "Hand-waving" .)