Related Clues:

• Pressure line on a weather map
• Pressure line on chart
• Line in front causes obstruction: none must enter
• Met map pressure line
• One fly straddles black line on weather map
• One's no obstacle in the meteorologist's line
• Is old pub a feature on some maps?
• Line showing points having equal barometric pressure at a given time
• One prisoner at the centre serves drink - it presumably creates its own pressure
• Barometric curve
• A sign of pressure when one thereupon heads for drinking hole!
• A line on a chart is nothing to the legal profession
• Met line of equal pressure
• One's pub has nothing in such a pressure line
• Line on a map connecting places of equal atmospheric pressure