Hello crossword solvers! Today let's find the answer to the clue ___ Khalifa (world's tallest building) 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 ___ Khalifa (world's tallest building). The answer we found for the clue ___ Khalifa (world's tallest building) is: