Feta production is destiny (4)
I believe the answer is:
fate
'is destiny' is the definition.
(I've seen this in another clue)
'feta production' is the wordplay.
'production' is an anagram indicator.
'feta' anagrammed gives 'FATE'.
(Other definitions for fate that I've seen before include "E.g. Clotho, Atropos" , "One's lot" , "Predetermined end" , "Lady luck" , "Fortune" .)