Crossword puzzle clue "state lines"

Lines of people read lines at these

A-lines' lines

Illinois, Indiana, Iowa, Michigan, Michigan State, Minnesota, Northwestern, Ohio State, Penn State, Purdue and Wisconsin

State lines?

Crossing state lines, perhaps

Article of tropical apparel ... whose start is a state nickname for the state indicated by the circled squares

Unlikely state of a state?

Secretariat's mother, for one ... whose start is a state nickname for the state indicated by the circled squares