Select a pot with bottom drainage holes that is one size larger than the current clivia container. For example, repot into a 12-inch-diameter container if the plant was previously growing in a 10-inch-diameter pot.
Place 2 inches of standard potting soil in the container. Water the soil lightly until moisture just begins to drip from the bottom of the pot.
Slide a dull knife around the inside of the clivia's pot to loosen the soil and root ball. Turn the pot on its side and slide the clivia out of the pot, thumping the bottom of the pot to dislodge the plant if necessary.
Set the clivia into the new pot. Add more soil beneath the root ball, if needed, to elevate the top of the roots to 1 inch beneath the pot rim.
Fill in the pot with additional soil until the clivia is potted at the same depth it was growing at previously. Water the soil until moisture drips from the bottom of the pot. Add more soil if it settles below the top of the root ball after watering.
Set the repotted clivia near a window where it receives partial shade or bright but indirect all-day sunlight. Water the plant when the top 1 to 2 inches of soil feels dry.