Is it less burdensome than a box of matches? (7)
I believe the answer is:
lighter
'matches?' is the definition.
(matches is a kind of lighter)
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 "Open boat - spill" , "Barge (more likely to float?)" , "- boot; - bun; - ware" , "The girl (anag.)" , "Vessel" .)