Possible Clues:

• Is broken sedan found in river? Up you get then!
• "Wake up, sleepyhead!"
• Start brightly, then extremely hard rain is seen falling
• SUN ..
• Wake up, as will the sun bright and early?
• Get out of bed smartly!
• Greet the day cheerfully
• Another morning exhortation
• A wake-up call for the Sun?
• Reforms inside NHS are a wake up call