Answer: stepsisters

AnswerCrossword Clue
STEPSISTERSSaint and high priestess may be relatives (11)
STEPSISTERSCinderella had two
stepsistersA daughter of one's stepparent by a marriage other than with one's own father or mother
stepsistersSTEPSISTER, a daughter of one's stepparent by a former partner