Actor's sin turned out to be a pastry item (9)
I believe the answer is:
croissant
'be a pastry item' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'actor's sin turned out' is the wordplay.
'turned out' is an anagram indicator (turn out can mean to organise).
'actors'+'sin'='actorssin'
'actorssin' with letters rearranged gives 'CROISSANT'.
'to' is the link.
Can you help me to learn more?
(Other definitions for croissant that I've seen before include "that baker turns out" , "French pastry" , "Bread-roll" , "Breakfast pastry" , "Breakfast roll" .)