Revolution, turning (8)
I believe the answer is:
rotation
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">revolution</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that revolution can be written as rotation)</span><br/ ><br/ >'<span class="explanation-format__original">turning</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that rotation is a type of turning)</span><br/ ><br/ ></span>
(Other definitions for rotation that I've seen before include "Recurrent order" , "Turning movement around an axis" , "Cycle - revolution" , "Action of turning" , "Process of turning" .)