Related Clues:

• Late-night host
• He follows the news
• Late-night name
• Carson successor
• TV host who does 'Headlines'
• Letterman rival
• See 5-Across
• See 19-Across
• Big name in comedy
• Rag
• Ambient music pioneer
• School assignment
• Daily delivery
• Plastic alternative
• Jay who has Monday night 'Headlines'