CleanCloud has support for taking partial payment from a customer when you create the order, and taking the remainder when you complete the order.
Turn on Partial Payment support
Go to the Settings > Admin > Payments & Finances > Payments
Switch on the setting 'Allow for Partial Payment'
Press the 'Submit' button below
Using Partial Payment
When creating a New Order and you hit 'Submit' you will find the partial pay options to choose from.
Choose Partial Payment by Card or Cash then enter the Pre-Pay amount that the customer has provided and Submit the order
When the customer comes to pickup their completed order press the Payment button for the order on the READY page. This will then show you the remaining balance on the order and provide you with the list of payment options to take final payment.
Please note: If you are based in the United States, you also have the ability to take partial payments via the Clearent card terminal.