Possible Clues:

• Hole formed by impact or explosion
• Old car Rex put beneath a hole in the ground
• Hole (on the moon?)
• Might this be a boxer that could blow his top through this?
• Credit's hidden charge produces depression
• Bowl-shaped cavity as on volcano peak
• Large hole in box runs to the bottom
• Credit charge is absorbed, leaving a hole
• Great depression
• Lunar locale