Choose a Cloze Person Added to List trigger and a Freshbooks Create Client action.
Select your Cloze and Freshbooks accounts
Add a filter to only trigger a "Person added to list" from Cloze when a person is added to a List. In this example the Zap will only trigger when a contact is added to the Customer list.
Match up Cloze Person added to list to Freshbooks Client
Name and turn this Zap on