Worry, say, for a time (5)
I believe the answer is:
phase
'a time' is the definition.
(thesaurus)
'worry say' is the wordplay.
'worry' becomes 'faze' (I've seen this before).
'say' indicates a 'sounds like' (homophone) clue.
'faze' sounds like 'PHASE'.
'for' acts as a link.
(Other definitions for phase that I've seen before include "Shape (anag.)" , "Truman -, US novelist" , "stage in process of development" , "Any distinct time period" , "Aspect of moon" .)