Hello crossword solvers! Today let's find the answer to the clue Mr. ___ (Marquand sleuth) from the USA Today crossword. After we've gathered any other hints from the USA Today crossword puzzle and all possible helpful and relevant information from other sources, we are ready to solve the clue Mr. ___ (Marquand sleuth). The answer we found for the clue Mr. ___ (Marquand sleuth) is: