Related Clues:

• Routine that tires
• Line at a track
• Stalactite's place
• Bats' place
• Home for a bat
• Stalagmite site
• Spelunkers' place
• ''B.C.'' abode
• It's hard to get out of one
• Home for bats
• Boring place
• Spelunker's hangout
• Beaten track
• Repetitive routine
• Dirt road depression