Outdoor blaze (7)
I believe the answer is:
bonfire
'outdoor blaze' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bonfire that I've seen before include "No brief for an open air conflagration" , "Hallowe'en conflagration" , "Guy Fawkes Night blaze" , "Source of blazing" , "November 5 feature" .)