Period of confusion, say (4)
I believe the answer is:
days
'period' is the definition.
(thesaurus)
'confusion say' is the wordplay.
'confusion' becomes 'daze' (daze is a kind of confusion).
'say' shows a homophone (sound like).
'daze' is a homophone of 'DAYS'.
'of' acts as a link.
(Other definitions for days that I've seen before include "See 7 and 18" , "Time period(s)" , "See 1 down" , "Sun, Mon, Tues, ..." , "Periods (of week)" .)