Possible Clues:

• What dog likes about tree that's lit up in the garden
• It's usually lit on Guy Fawkes' day
• No brief for an open air conflagration
• If Ron be outside, is he alight?
• Large outdoor blaze
• Burns night? Is that when one gets lit up?
• Homecoming tradition
• Source of warmth on 5 November?
• Nov 5 blaze?
• What could be alight on sixth of November!