Is this hotter than a smoking jacket? (6)
I believe the answer is:
blazer
'smoking jacket?' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for blazer that I've seen before include "Summer sporting jacket" , "School jacket (on fire?)" , "Light single-breasted (school or club) jacket" , "First to trail" , "Man's jacket, sounds hot" .)