Dish left in hacienda, cooking (9)
I believe the answer is:
enchilada
'dish' is the definition.
(I know that enchilada is a type of dish)
'left in hacienda cooking' is the wordplay.
'left' becomes 'l' (common abbreviation).
'in' indicates putting letters inside.
'cooking' indicates anagramming the letters (cook can mean to falsify or distort).
'hacienda' anagrammed gives 'enchiada'.
'l' put into 'enchiada' is 'ENCHILADA'.
(Other definitions for enchilada that I've seen before include "spicy snack" , "Rolled stuffed tortilla with chilli sauce" , "Tortilla and chilli dish" , "spicy dish" , "Mexican tortilla with chilli" .)