Related Clues:

• Caboose locale
• Service entrance, sometimes
• Service-entrance site
• Paddler's target, perhaps
• Target of a swift kick, perhaps
• Caboose's position
• Rump
• Back end
• Congratulatory slap location, maybe
• Tail end?
• Service entrance location, sometimes
• Bum, to some
• Back part
• At the back
• Dorsal