Time spent in a stupor, might one say? (4)
I believe the answer is:
days
'time spent' is the definition.
(day is a unit of time)
'stupor might one say?' is the wordplay.
'stupor' becomes 'daze' (synonyms).
'might one say?' shows a homophone (sound like).
'daze' sounds like 'DAYS'.
'in a' acts as a link.
(Other definitions for days that I've seen before include "See 1 down" , "Twenty-four hour periods" , "See 7 and 18" , "` `They are not long, the .... of wine and roses' ' (Dowson)" , "Twenty four hour periods" .)