Q.Clivia plant
My clivia plant is kept in the conservatory in summer and indoors in winter; however, the leaves are turning yellow. What is the problem and what can I do about it?

Yellowing leaves are generally an indicator of watering issues. To much or to little.
Make sure the soil dries slightly between waterings. Check the soil, don't water on a schedule.
Also insects or disease can cause yellowing leaves. Check for signs of insects and treat with Neem Oil if indicated.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm