Woman's captivated by philistines: tell everyone (7)
I believe the answer is:
estelle
'woman's' is the definition.
'captivated by philistines tell everyone' is the wordplay.
'captivated by' says the answer is hidden in the clue.
'ESTELLE' can be found hidden inside 'philistines tell everyone'.
(Other definitions for estelle that I've seen before include "Lets Lee produce a girl's name" , "Star girl" .)