Roll joint, getting one blown away (10)
I believe the answer is:
tumbleweed
'roll' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tumbleweed that I've seen before include "Western drifter" , "Plant of arid regions, rolled about by the wind" , "Plant swept along by the wind - wet Elbe mud (anag)" , "Plant that blows around in the wind" , "Plant blown as a dry ball by the wind" .)