Of motion (7)
I believe the answer is:
kinetic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for kinetic that I've seen before include "(E.g. energy) of motion" , "due to motion" , "Like a mobile" , "Resulting from motion" , "Concerned with moving" .)