Related Clues:

• Game at final furrow
• Watch out! There's a great big hole!
• Underground space
• Pothole -- beware!
• Monotonous routine that is hard to escape
• Take care in underground passage
• Beware of schoolboys
• Routine show of affection
• Large grotto
• Hollow Conservative greeting
• Groovy time of excitement?
• Period of sexual excitement in some male ruminants
• Beware of a dark place
• Bat's underground home
• Batman's hangout