Cogs; fangs (5)
I believe the answer is:
teeth
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cogs</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">fangs</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for teeth that I've seen before include "Canines, maybe" , "Structures in the jaws" , "Cog wheel projections" , "Fangs" , "Projections on a gear" .)