Alone, without company (8)
I believe the answer is:
solitary
I believe this clue is a double definition.
'alone' is the first definition.
(I know that alone can be written as solitary)
'without company' is the second definition.
(I've seen this before)
(Other definitions for solitary that I've seen before include "Without company" , "Being the only one" , "Alone, single" , "Confinement" , "Lone; isolated" .)