Related Clues:

• Pork, to a Jew, e.g.
• No-no
• Exclude
• 'That's a ___!'
• Test-___ treaty
• Prohibit
• Talking during a film, e.g.
• Thou-shalt-not
• Put an end to
• Outlaw
• Blackout
• Major no-no
• Rule out
• Forbidden fruit
• Bar