Possible Clues:

• Pair of warrant officers appearing in book
• Folk riding tandem, say, more or less following anything from behind
• Couple setting up broadcast in personal dedication
• Couple may see pig turning up in book
• A couple of people owe most, unfortunately
• Actress Peet
• Climbing plant collected by book group that's very small
• Pair, duo
• Book about setting up of broadcast item, possibly
• Couple with book about beast from the east