I have seen all kinds of theory's of this clue FFG dropped on us. Most seems to think its a 1-K or a curved K maneuver. There is the move backwards movement and even more boring a changing of a color on a dial.
Let's think a lot deeper into this clue. There are 11 movement templates in the game. There is only so many combinations of these 11 template they can do befor it feels familur to other ships. Each purchase of an expansion comes with everything you need to field that ship, shields, focus, stress and so on. What if the Tie Defender comes with a template to accommodate this "a maneuver never before seen on a dial"? What if this maneuver is a bank 4, Turn 4, or god help us a Striaght 6? Perhaps, a maneuver not in the current scope of the game like a turn beyond 90 degrees? Since the ships come with everything you need to field it, you would have no need for a new template unless you have the ship.
With all that said, it's probably a 1 koiogran turn......*boring*