Herein, we demonstrate threshold clustering on calculated CSP landscapes for benzene, acrylic acid and resorcinol-three systems of varying intermolecular interactions and conformational flexibility. The results show threshold clustering can significantly reduce the number of candidate structures on CSP landscapes, transforming them to basin minima on the basis of average thermal energy at ambient temperature. This is achieved without a complex pipeline and moreover on the same energy surface as the original CSP, therefore eliminating any ambiguity regarding the connection between the reduced structure set and the original landscape.