Cyclin partner of the cyclin-dependent kinase (CDK) PHO85. Together with cyclin PCL8, negatively controls glycogen accumulation under favorable growth conditions. The PCL10-PHO85 cyclin-CDK holoenzyme has glycogen synthase kinase activity and phosphorylates and negatively regulates glycogen synthase GSY2. Also has minor GLC8 kinase activity. Forms a cyclin-CDK complex with PHO85. Interacts with GSY2, independent of the presence of PHO85. Present with 217 molecules/cell in log phase SD medium. Belongs to the cyclin family. PHO80 subfamily.