Related Clues:

• Johnson's publisher - look out for his name in Latin
• Swift's beastly portal
• Watch out for the hole
• Chicken with lowered resistance in a vast enclosed space
• Liverpool club where The Beatles started out
• Look out for English nurse who's shed a couple of pounds
• The underground parts of vinca vernalis
• Large dark hole in the ground
• Hollow in the earth
• Norris leaves carnivores in grotto
• Place studied by a speleologist
• Many swear and a quarter get into a hole
• Watch out! There's a great big hole!
• Underground space
• Getting warning, half turn from a big hole