Possible Clues:

• N.I., one by one
• How pinball players play
• Elected to go off one after the other
• Put in prison, we hear, one after the other
• Elected to pass one after the other
• One of the trainee doctors you may see, it's rumoured, sequentially
• In proper order or sequence
• One after another go to bed, but in the wrong order
• Shut up, listening as a succession of things happen
• Report of trainee being given orderly treatment