Answer: grandfather

AnswerCrossword Clue
GRANDFATHERFirst of its kind
GRANDFATHEROrnate + diet part + that girl
GRANDFATHERType of clock
GRANDFATHERClock or clause
GRANDFATHERAncestor
GRANDFATHERCertain ancestor
grandfatherthe father of one's mother or father / to exempt (an activity, person, etc) from a new piece of legislation, restriction or the like
grandfatherThe person who founded or originated something
grandfatherThe father of one's father or mother