Positive motion (3)
I believe the answer is:
nod
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">positive motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nod that I've seen before include "Gesture of acceptance" , "Be agreeably" , "OT land" , "Signify agreement" , "It's said to be as good as a wink" .)