Motion (8)

I believe the answer is:
movement
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for movement that I've seen before include "Having cause" , "drive" , "Section of, eg, symphony" , "Mechanism" , "Motion" .)