Shared a cigarette of sorts, perhaps (5)
I believe the answer is:
joint
'shared' is the definition.
(similar in meaning)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for joint that I've seen before include "Piece of meat - illegal smoke" , "Piece of meat for roasting" , "Point in the body where two bones meet" , "American bar" , "Together - location" .)