Sleep disturbed, not softly. Whence? Not here
I believe the answer is:
elsewhere
'not here' is the definition.
(I've seen this in another clue)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for elsewhere that I've seen before include "Not at home" , "different position" , "different places" , "Not in this place - try another" , "abroad?" .)