Smoking accessory is more trivial (7)
I believe the answer is:
lighter
'smoking accessory' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for lighter that I've seen before include "- boot; - bun; - ware" , "smoker may resort to it" , "Less weighty" , "Barge - alternative to match" , "Ship to shore boat" .)