I've e-filed on ClearTax, but have not e-verified.

If you have filed your return and failed to send the ITR V within 120 days of e- filing then the option of e- verification will not be available . For such a case, you can send the ITR-V to the Income Tax department and complete your e filing. 

The address where ITR V is to be sent is Income Tax Department - CPC, Post Box No - 1, Electronic City Post Office, Bangalore - 560100, Karnataka, India.