Ghosts, shades (8)
I believe the answer is:
spectres
I believe this clue is a double definition.
'ghosts' is the first definition.
(spectre can mean a ghost)
'shades' is the second definition.
('spectre' can be a synonym of 'shade')
(Other definitions for spectres that I've seen before include "Respects, being spirits" , "Pay respects to ghosts" , "Ghostly apparitions" , "Ghosts, shades" , "Phantoms, apparitions" .)