Possible Clues:

• Remove dirt with a brush
• Go undefeated in a tournament
• A clean one is a total victory
• Check for bugs in room: it's a lottery
• Search could make son cry
• Do a little housework
• Lottery odds? Very small, essentially
• Four straight wins to start the World Series, e.g
• Brush; rush
• "Chimney" or "clean" follower