What’s the point of extra minute in sleep? (5)
I believe the answer is:
comma
'what's the point' is the definition.
(thesaurus)
'extra minute in sleep?' is the wordplay.
'extra minute' becomes 'm' (abbreviation. I am not sure about the 'extra' bit.).
'in' indicates putting letters inside.
'sleep?' becomes 'coma' (I have seen 'Deep sleep ' mean 'coma' so perhaps 'sleep' could also mean 'coma').
'm' inserted within 'coma' is 'COMMA'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for comma that I've seen before include "Short break" , "Kind of butterfly" , "Puncuation mark" , "its use may be divisive" , "Mark for smallest division of a sentence" .)