Answer: mrslate

AnswerCrossword Clue
MRSLATE92 Down's boss
MRSLATEFlintstone's boss
MRSLATEAptly named boss at the quarry where Fred Flintstone works
MRSLATEPrehistoric toon boss
MRSLATECartoon boss of prehistoric times
MRSLATEFred Flintstone's boss
MRSLATECartoon boss working at a quarry
MRSLATEQuarry boss of cartoons