Answer: queenmum

AnswerCrossword Clue
QUEENMUMKing George VI's widow, familiarly
QUEENMUMNoted centenarian of 2000, familiarly
QUEENMUMThe late Elizabeth Bowes-Lyon, familiarly
QUEENMUMROYALTY
QUEENMUMEnglish dowager, affectionately