I will avoid various coal-fires out of doors (8)
I believe the answer is:
alfresco
'out of doors' is the definition.
(synonyms)
I can't explain the rest of the clue.
(Other definitions for alfresco that I've seen before include "Outside" , "Outdoors, meal perhaps" , "In the open air" , "where it's cool" , "out of the house" .)