Related Clues:

• Is nothing but a pressure line
• Boris, a mad feature on the map
• Line joining places of equal barometric pressure
• Forepart - audacity
• Line on weather map
• Line on a map connecting points of equal atmospheric pressure
• Pressure line on map
• Forward part - weather feature
• Meteorological line joining points of equal pressure
• Line on map connecting places of equal atmospheric pressure
• Line showing points of equal barometric pressure
• Boris takes a strangely pressurised line
• Weather map air pressure line
• Line on a map is around bar
• It connects points of equal air pressure