The Pro Subscription adds the ability of a club to create and promote clinics / lessons and to collect fees for those clinics / lessons.  You will see a Pro Console in your navigation tree once you add a Pro Subscription.  The Pro Console is where you or your assigned tennis pros can create clinic fees, clinic cancelation policies, and view your pro staff.  To create a clinic, you would create a reservation in your club calendar and select clinic under the reservation type.