The clues are combinations of two termini of the line. For example, if the termini were 'Sporcle' and 'London' the clue might be 'Spordon'.
You only need to enter the first three letters of the line
Classic: Type in answers that appear in a list
Forced Order: Answers have to be entered in order
Wrong Answers: Some wrong answers will appear in red
In order to create a playlist on Sporcle, you need to verify the email address you used during registration. Go to your Sporcle Settings to finish the process.