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In large scale MANETs, centerless clustering algorithms need to reduce topology and routing maintenance overheads by constructing a stable hierarchical topology. So attention should be focused on topologypsilas stability. At present, attentions are paid to the inner cluster topologypsilas stability, but the intercluster topologypsilas stability is neglected. Therefore, we propose a fully distributed clustering algorithm for MANETs in which both the inner cluster topologypsilas stability and the intercluster topologypsilas stability are concerned. The main objectives of this algorithm consist in stabilizing the topology as a long time as possible and in further reducing the topology and routing maintenance overheads. For a better comprehension of our algorithm, an explanatory example is given. To compare our algorithm to lowest ID based mobile clustering algorithm, a simulation is studied. The conclusion shows that:our algorithm is more favorable to the topologypsilas stability and reduces network overheads a lot, which improves the network performance.