Related Clues:

• A biro's wielded on a synoptic chart
• Michael Fish's go-between?
• It shows pressure or bias is developing
• Is pub after zero pressure consistent here?
• Eminent firm's four characters, time inside, deserved diamonds, they rule
• Drunk in the centre of Oxford?
• I fly around British feature on map
• Is nothing but a pressure line
• Boris, a mad feature on the map
• Stoned possible precursor of summer school society?
• Going off - in great spirits
• Oxford street - drunk
• Underhand
• Line joining places of equal barometric pressure
• Line on weather map