Possible Clues:

• Northern Lights
• Night sight up North
• Radiant display also called the Northern Lights
• A rare and laborious struggle to produce a colourful display
• Atmospheric phenomenon in poor area railbus serviced without parking
• The northern lights
• New Labour area is billeting soldiers for 21
• Skylight for an igloo?
• A rare, laborious manifestation of merry dancers
• Miss Leigh gave birth to little boy, one son on display in the blue