(c++) CLL -> LLL?

For the purposes of making a destructor for a particular program, our professor said that we should "turn the circular linked list into a linear linked list". What exactly does that entail? Would just setting rear to Null and a head pointer to rear->next be enough?

>>3
I am in a class, thusly I am learning. One fascinating thing about people who are learning is that they don't fully understand the subject matter yet, if you can believe that, so kindly give me a straight answer or fuck off.