Aloof; disconnected (8)
I believe the answer is:
I believe this clue is a double definition.
'aloof' is the first definition.
(I've seen this before)
'disconnected' is the second definition.
(similar in meaning)
(Other definitions for detached that I've seen before include "Separate; aloof" , "being sent on special assignment" , "Separate, disconnected" , "Unconnected" , "Unprejudiced" .)