Fried tortilla turned lush - there it is! (7)
I believe the answer is:
tostada
'fried tortilla' is the definition.
(I've seen this in another clue)
'turned lush there it is' is the wordplay.
'turned' shows that the letters should be reversed in order.
'lush' becomes 'sot' (both can mean a drunk).
'there it is' becomes 'tada' (I can't justify this - if you can you should believe this answer much more).
'sot' written backwards gives 'tos'.
'tos'+'tada'='TOSTADA'
Can you help me to learn more?
(Other definitions for tostada that I've seen before include "Crisp 15 down" , "Mexican food" , "spicy food" , "Mexican topped pancake" .)