Answer: masondixon

AnswerCrossword Clue
MASONDIXONTheir line was in real estate
MASONDIXONLine that defined the South
MASONDIXONLine of fame
MASONDIXONWell-known line.
MASONDIXONDivisive line
MASONDIXONBorder names
MASONDIXONKind of line symbolizing a cultural boundary