Related Clues:

• ''Son of ___!''
• Race starter's aid
• Rev the engine
• Hired killer
• ZIP ___
• Smoking evidence?
• Luger or Ruger
• Hunter's weapon
• Under the __
• "Bop ___" (Parliament song)
• Rev, as an engine
• Rifle or revolver
• Magazine holder
• Western prop
• One of five in this puzzle