Slow-moving (8)
I believe the answer is:
sluggish
I believe this clue is a double definition.
'slow' is the first definition.
(I know that slow can be written as sluggish)
'moving' is the second definition.
(I have seen 'Slow moving' mean 'sluggish' so perhaps 'moving' could also mean 'sluggish')
(Other definitions for sluggish that I've seen before include "Slow-moving like garden mollusc" , "Torpid" , "Hardly speeding" , "like a bullet?" , "Slow moving" .)