Possible Clues:

• It's early for your boy to be out of bed, by the sound of it
• Seems that NU's early
• Child told to get out of bed early in America
• Literal version of dawn
• Nu's early
• Daily start
• Daybreak (in America)
• Time to rise, for many
• When star makes first appearance in part of trip, unusually going North
• Dawn's a star at university