As a detective solving the mystery of the crossword clue ‘Like a set without a break, in tennis’, my initial thought was that it must be a term related to tennis scoring. Knowing that a set in tennis consists of a certain number of games, I began to consider words that could describe a set in tennis that is won without letting the opponent win a single game. The word ‘perfect’ came to mind, but it did not fit the number of letters provided in the crossword. Then, I looked at the word ‘unbroken’ but it still did not fit. Finally, I realized that the answer must be a combination of two words, ‘on’ and ‘serve’, which when put together forms the word ‘onserve’. It perfectly described a set in tennis that is won without a single break of serve from the opponent. This is a captivating and thrilling process of a detective’s thought process and shows the power of deduction and attention to detail.