Related Clues:

• Sleeping in, say
• In the sack, slangily
• Reading by a night light, perhaps
• In for the night
• Troy's buddy, on 'Community'
• Professor's designation, perhaps
• Troy's buddy, on "Community"
• Type of professor
• Still in one's bunk
• Asleep, perhaps
• Having hit the hay, so to speak
• Undercover, maybe
• Retired prof's title
• Like many dreamers
• Retired and retaining title, say professor