Answer for the clue that begins, “Down jazzy side streets…”

You first have to feed the quarter you were given for your quest to the Fortune Red machine. When you do, he offers you a Jolly Roger fortune card. On the back of that card, there are a series of pirate flag designs, each with a number beneath them. Those numbers are used to solve a Greek Square cipher. The logos on the flags represent the number beneath them on the card, and are presented in sets of two on the clue, each producing a two-number set. The first number is used to identify which column of the Greek Square is needed, and then the second number identifies which row. The intersection produces a single letter. There are ten sets of numbers represented by the flag logos, producing a ten-letter word:

CROSSBONES