Possible Clues:

• Consisting of straight lines
• All in straight lines
• Moving in a straight path
• Airliner, etc moving in a straight path
• Straight railway with damaged erratic banking
• Like the street grid of Midtown Manhattan
• Moving in straight lines
• Straight track cut into erratic ground
• Reformed enticer, liar going straight
• Following direct route, tire in race, staggering across line