Related Clues:

• Tiler's gap-filler
• Rubber band for braces adjustment
• One step in one gap of one type
• That might make a gap for the southern walker
• Interval introducer, second one to step out
• Bit of orthodontia
• Orthodontic device
• One keeping apart from silly capers
• One preserving gap made by engineer in mineral
• It provides room for new recaps
• Run with speed - after second one creates gap
• Something keeping apart
• Thick washer
• Argument outside church? One may prevent physical contact
• Washer