Related Clues:

• ___ further review
• Situated on
• In a good lookout position
• Looking down on
• Perching on
• On the highest rung
• "___ further review ..."
• "Once ___ a time . . ."
• "Once ___ a midnight dreary . . ."
• Topping
• Riding piggyback
• Soon after
• At the head of
• Fully briefed about
• Shortly following