Cooked in oil
'cooked in oil' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fried that I've seen before include "Cooked in oil/fat" , "Cooked on a hot surface" , "Cooked in fat" , "Cooked in oil" , "Such as cooking chips" .)
(Another definition for deep-fried that I've seen is " like some Glasgow chocolate bars?".)