As a detective solving the mystery of the crossword clue ‘Papal topper‘, I first began by analyzing the clues given in the question. I knew that the word ‘Papal‘ suggested a connection to the leader of the Catholic Church, the Pope. Then the term ‘topper‘ indicated that the answer was likely to be something worn on the head. I then considered the types of headwear that are typically associated with the Pope. After a few moments of contemplation, I remembered that the Pope is often seen wearing a ceremonial hat decorated with jewels and symbols of the church. This hat is known as a ‘Tiara‘. When I checked the letters available to work with in the crossword, ‘TIARA‘ seemed to fit perfectly, and my investigations led me to my answer. The thought process that led me to uncover this mystery was both logical and attentive to the clues presented. The cleverly constructed clue allowed me to use my intellect to solve the crossword puzzle and learn a little more about the world around us.