Findings:

• golf clap
• The Slate Project
• Slate Star Codex
• slate (user)
• blank slate
• clean slate
• Slate bar
• Draw slate
• The Blank Slate
• Mr. Slate
• Slate
• Tim clapp (user)
• Don't clap too loudly; it's a very old world.
• clapp (user)
• nerd clap
• Clap
• Clap Your Hands Say Yeah
• If you're happy and you know it clap your hands
• Verner Clapp
• She really does want to clap along, but at the same time she doesn't want to let the bird get out.
• Homer Clapp
• How to clap with one hand
• clap hands (user)
• communist clap
• The Clap
• Old clap
• clap board
• Claps

If you Log in you could create a "clap slate" node. If you don't already have an account, you can register here.