Slumbering (6)
'slumbering' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for asleep that I've seen before include "coiled up?" , "Snoozing" , "Please be at rest (6)." , "Conked out" , "Dormant, inactive" .)
'slumbering' is the definition.
('sleep' can be a synonym of 'slumber')
This is the entire clue.
(Other definitions for sleeping that I've seen before include "In the land of Nod" , "Dormant" .)