Related Clues:

• Breathing space required to make complex replicas
• Whale's nostril
• Insect's opening for air
• Whale's blow-hole
• Whale's blowhole, e.g
• Parcel is forced in vent
• Helix accommodates 100 at first ever opening of The Whale
• Second design of replica vent for breathing
• Pal cries out for a breather