You're correct, @Dancz. You don't need to create a clearing account to clear the undeposited funds (UF). You only need to deposit the funds into the correct bank account. I'll explain how QuickBooks Payments work below.
 

To answer your question, clearing an account won't affect or add more income since it only transfers the funds from Undeposited funds to the clearing account.
 

To begin with, if you're using QuickBooks Payments, you don't need to do anything. QuickBooks Payments will automatically receive the payments and place them in Undeposited Funds. It will also automatically create a Bank Deposit to clear the funds from Undeposited Funds.
 

If you see payments in the UF, they are likely manually created invoices or payments added by your client. Ask your client to verify the payments from Undeposited Funds. If these are manually created entries or valid payments or if you're not not sure which correct bank account to deposit to, request their bank statement as your basis to match those payments to the right bank.
 

Let me know in the comments below if you have any other questions about QuickBooks.