Possible Clues:

• Warm bedding
• Ben talks about the bedclothes
• Ben talks about bedding
• Don't speak to locals, aliens or those lying about the kings and queens
• They might be down for a nap
• Covers for those characters at the end of 15 across at school
• Switches pepper in table's mill for covers
• Ben talks about bedclothes
• Winter warmers
• Bed coverings