Related Clues:

• L.A.-to-D.C. direction
• L.A.-to-N.Y. dir.
• Denver-to-Chicago dir.
• Vane letters
• Wind dir
• Wind dir., maybe
• Nautical heading, briefly
• Benz trailer?
• Houston-to-Charleston dir.
• ''Acetyl'' ending
• Reverse of WSW
• 180 deg. from WSW
• Storm heading, perh.
• Butyl ending
• NYC-to-The Hamptons dir.