Graphite; leadwort (8)
I believe the answer is:
plumbago
This clue is a double definition.
'graphite' is the first definition.
(I know that graphite can be written as plumbago)
'leadwort' is the second definition.
(I've seen this before)
(Other definitions for plumbago that I've seen before include "Blue-flowered plant" , "Leadwort" , "climber in bed" , "Word for graphite" , "Evergreen shrub" .)