Gearwheel (3)
I believe the answer is:
cog
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gearwheel</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 cog that I've seen before include "Machine wheel" , "Minor person in organisation" , "Little gearwheel" , "Junior official" , "that engages with others in revolution" .)