Before revision:  The non-monotonical affection of clusteringis quite unintuitive. And what it affects under the minimal model reveals the great potential effects and also the great complexity of clustering when games are involved. We also notice an uncoordination between the fixation probability and fixation time for mutants .
After revision:  It gives rise to the non-monotonic effect of clustering, which is counterintuitive. On the other hand, we find that less assortative mutants speed up fixation. Our model shows that the clustering of mutants plays a non-trivial role in fixation, which has emerged even if the game interaction is absent .