Possible Clues:

• Incident that is enthralling daughter late in the day
• Regular flow of the sea of late in poetry
• Regular flow at the end of the day
• After competition I had little energy � it's just before nightfall
• Flat, then something ebbing and flowing late in the day
• It's approaching nightfall — with scores level, pronounced drawn
• Regular flow of water at sunset
• Byron's day-ender
• Almost plan on result some time later?
• Lack of variation in sea level at the end of the day?