A coup participant is someone who takes part in a coup, which is an illegal and often violent attempt to overthrow a government. The three crossword solutions for the term 'coup participant' are deposer (7 letters), PLOTTER (7 letters), and SCHEMER (7 letters). A deposer is someone who deposits money or other assets into a bank account or other financial institution. A PLOTTER is someone who plans or devises a scheme or plot. Finally, a SCHEMER is someone who plans or devises a scheme or plot with the intention of achieving a particular goal.