A roll of leaf tobacco (5)
I believe the answer is:
cigar
'a roll of leaf tobacco' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cigar that I've seen before include "Roll of tobacco leaves for smoking" , "Big roll of tobacco" , "Close, but no ___ !" , "Eg, a cheroot" , "Havana, for example" .)