Cloning is a process of creating replica so if you need test Database similar to Production you can clone it.
You can clone Oracle Database on Cloud using Snapshot.
Check step by step procedure to Clone Oracle Database on Cloud (DBCS) using snapshot at https://k21academy.com/clouddba36
Oracle ACE, Author, Speaker and Founder of K21 Technologies & K21 Academy : Specialising in Design, Implement, and Trainings.