Sleep, slumber (7)
I believe the answer is:
shuteye
This clue is a double definition.
'sleep' is the first definition.
(I know that shuteye is a type of sleep)
'slumber' is the second definition.
(I know that shuteye is a type of slumber)
(Other definitions for shuteye that I've seen before include "Informal sleep - close optic" , "Slang sleep, literally described" , "nap" , "zeds" , "Sleep (colloq.)" .)