A burning jacket? (6)
I believe the answer is:
blazer
'a burning jacket?' is the definition.
'blazer' can be an answer for 'jacket?' (blazer is a kind of jacket). I'm not certain of the 'a burning' bit.
'burning jacket?' is the wordplay.
'burning' becomes 'blaze' (blaze is a kind of burning).
'jacket?' becomes 'r' (I can't justify this - if you can you should believe this answer much more).
'blaze'+'r'='BLAZER'
Can you help me to learn more?
(Other definitions for blazer that I've seen before include "First to trail" , "Type of jacket for sports officials" , "Summer sporting jacket" , "Loose-fitting jacket for school or team" , "Jacket, worn by officials" .)