Times of bewilderment, we hear (4)
I believe the answer is:
days
'times' is the definition.
(day is a unit of time)
'bewilderment we hear' is the wordplay.
'bewilderment' becomes 'daze' (I've seen this in another clue).
'we hear' shows a homophone (sound like).
'daze' sounds like 'DAYS'.
'of' is the link.
(Other definitions for days that I've seen before include "` `They are not long, the .... of wine and roses' ' (Dowson)" , "Twenty four-hour periods" , "Periods of 24 hours" , "Periods (of week)" , "Twenty-four hour periods" .)