Related Clues:

• Part of a Three Stooges routine
• Catty comment
• Response to a pickup line, perhaps
• Duel preliminary
• Impolite remark
• Rebuke
• Smack in the face
• Like a bunch
• Response to an affront
• Archaeological site
• One way to get underground
• Probe
• Token punishment
• Understand, slangily
• Archaeological excavation