Answer: mrb

AnswerCrossword Clue
MRBWhat Elmo calls Dagwood in "Blondie"
MRBWhat Elmo calls Dagwood
MRBDagwood, to Elmo
MRBHazel's boss, to Hazel
MRBNickname of the household head on TV's "Hazel"
MRBHow Hazel addressed her boss