Related Clues:

• A type of tapering marine buoy, marking the starboard side of a channel into a harbour
• Creature of habit in conundrum
• Catholic school teacher, perhaps
• Sister in conundrum
• Mother Superior, perhaps
• Mother Teresa, famously
• Sister in on understanding
• Convent-ional sort
• One who completed the novitiate
• Sister omitting nothing in part of speech
• Sister some Unitarian Universalist
• Certain mother or sister
• What to call some sisters
• Whoopi Goldberg, Audrey Hepburn and Deborah Kerr have all played ___s in films
• Joshua’s father in the Old Testament