The .clinic domain falls under the Services category of new top-level domains. The ways in which this domain can be used and its potential owners are numerous, such as clinics, doctor's offices, industry professionals, but also websites dedicated to health care services and to health in general.
Discover the services dedicated to the trademark owners, such as the Trademark Clearinghouse - TMCH (the only global database of registered brands authorized by ICANN), or the Domains Protected Marks List - DPML (block of the registrations of similar/equivalent domains of your brand in over than 200 of the new extensions).