The Wall Street Journal crossword can be very challenging. But we are here to help! Today we will help you find the answer to the clue Jimmy Fallon's 'Tonight Show' house band. After hunting for any other hints and relevant information in the Wall Street Journal crossword puzzle we've found the answer to the clue Jimmy Fallon's 'Tonight Show' house band. The answer to the clue Jimmy Fallon's 'Tonight Show' house band is: