Before revision:  In order to explore the solely and fundamental effect of the clustering  , we employ a minimal model where no game is involved and a simple cycle is adopted.
After revision:  In order to explore the solely and fundamental effect of the clustering of mutants and the game dynamics are typically coupled. It is still unclear how the clustering of mutants alone alters the evolutionary dynamics. To this end , we employ a minimal model where no game is involved and a simple cycle is adopted.