spellmistress

noun2

1. •
   A female expert or consummate spellcaster.

   • Kill an Aravu spellmistress. — 2005
2. •
   A woman in charge of running a spelling bee.

   • “Rampant,” boomed the spellmistress, dressed officiously in green. Elysia Dunford, 9, approached the microphone: R-A-M-..........P.....-I-N-T. “incorrect,” droned the grey-haired judge. — 2000