Possible Clues:

• Sun - had small boy to be protected from it?
• Under a parasol, e.g.
• 'To be out of the sun, Dad has turned up in the outhouse (6)'
• Father is up in the outhouse out of sun
• Compiler receiving notice to get out of the Sun?
• Left in the dark by mum, dead worried
• Coloured in; screened from direct light
• Under a canopy
• Father is back in the outhouse, out of the sun
• Under a parasol, say