Israelite Sarah and Abraham created initially (5)
I believe the answer is:
isaac
'israelite' is the definition.
(biblical figure)
'sarah and abraham created initially' is the wordplay.
'sarah' becomes 'isa' (I am not sure about this - if you are sure you should believe this answer much more).
'and' is a charade indicator (letters next to each other).
'initially' indicates taking the first letters.
The initial letters of 'abraham created' is 'ac'.
'isa'+'ac'='ISAAC'
Can you help me to learn more?
(Other definitions for isaac that I've seen before include "Son of Abraham, offered as a sacrifice to God" , "One nearly sacrificed" , "Son prepared for sacrifice" , "Boy's name" , "Stern" .)