Plotter, conspirator (7)
I believe the answer is:
schemer
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">plotter</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">conspirator</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for schemer that I've seen before include "Plotter and planner" , "Secret plotter" , "Person who plots" , "Plotter, conspirator" , "Machiavellian type" .)