Deep fryer liquid (3)
I believe the answer is:
oil
'deep fryer liquid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oil that I've seen before include "Anoint" , "Viscous substance for lubrication" , "Grease" , "What can be extracted" , "Viscous substance as lubricant" .)