How do you defeat your clones in YuGiOh Stardust Accelerator?

There is no "Stardust Accelerator" game in Yu-Gi-Oh! The term "Stardust Accelerator" might be referring to a specific card or deck archetype, but there is no official game or specific mechanic within the Yu-Gi-Oh! franchise that involves fighting your own clones.

If you're talking about a specific card or archetype, please provide more information so I can give you a more accurate answer!