An under-five clinic provides comprehensive healthcare to young children under one roof. The clinic aims to care for illnesses, monitor growth through regular weighings and measurements, provide preventive care like immunizations and nutrition, offer family planning counseling, and educate mothers on childcare. The health personnel oversee the clinic by selecting its location and schedule, maintaining equipment and records, examining and treating children, and instructing mothers. The goal is to optimize children's health through this specialized facility.