One wink or forty (7)
I believe the answer is:
shuteye
This clue might be a double definition.
'one wink' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'forty' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'or' is the link.
Can you help me to learn more?
(Other definitions for shuteye that I've seen before include "nap" , "Sleep (colloq.)" , "Slangy sleep with closed optic" , "Slang sleep, literally described" , "Informal sleep - close optic" .)