By default, ClearPass should be using 1812/1813 for authenticaiton & accounting. You can verify this under:
Administration > Server Manager > Server Configuration
Click on the server to take you to the server's configuration details.
Then, click on the Service Parameters tab.
Look for the drop-down menu at the top and select Radius server.
You should see all of the details for the Radius service.
When you open Access Tracker under Monitoring, do you see the authentication request being made? If so, click on it.
In the window that popped up, look at the bottom half and you'll see Policies Used. Is the line right below, Service: , blank or does it contain the name of the service you created?