Worries escalate after turkey's served for starters (4)
I believe the answer is:
eats
'worries' is the definition.
(eating is a kind of worrying)
'escalate after turkey's served for starters' is the wordplay.
'for starters' indicates taking the first letters.
The first letters of 'escalate after turkeys served' is 'EATS'.
(Other definitions for eats that I've seen before include "Ingests" , "Tuck" , "Grazes perhaps" , "Food (colloq.)" , "fare" .)