As a partner you can add clients through the All Clients tab inside the CRM. Simply click on add client. Adding a Client is the first step to give your client access to his website. To give a newly created Client access to his website you have to assign the client to the website (How do I assign a Client to a website?).

Here is how to add a client:

Step 1: Enter the CRM (How do I enter the CRM?)
Step 2: Click the All Clients tab (A)
Step 3: Click the add client button (B)
Step 4: Fill in the credentials (C)
Step 5: Click Create (D)