Possible Clues:

• Principles: Abbr.
• E.P.A. output: Abbr.
• What six of the across answers are harboring
• Problems in bed, briefly
• The usual amts.
• One-night stand souvenirs, sometimes: Abbr.
• Censor's list: Abbr.
• Problems that may result from screwing studs without using some kind of barrier device: Abbr.
• They define normalcy: Abbr.
• Bed bugs?