Smoking cylinder? Current good put through vehicle (5)
I believe the answer is:
cigar
'smoking cylinder?' is the definition.
(cylindrical object for smoking)
'current good put through vehicle' is the wordplay.
'current' becomes 'I' (physics symbol).
'good' becomes 'g' (abbreviation).
'put through' indicates putting letters inside.
'vehicle' becomes 'car' (car is a kind of vehicle).
'i'+'g'='ig'
'ig' put within 'car' is 'CIGAR'.
(Other definitions for cigar that I've seen before include "Roll of tobacco leaves for smoking" , "Havana, say" , "Cylinder of tobacco" , "Havana, perhaps" , "A real smoke!" .)