Related Clues:

• __ the line
• They may be pierced
• Aids for counting to 20
• Piggies of verse
• On one's ___ (alert)
• Low digits?
• Hose fillers
• Web sites, at times
• "Little piggies"
• Oft-pierced body parts
• They're painted by pedicurists
• Ostrich quartet
• The ten in "hang ten"
• Slipper tips
• Digital water testers?