Villain who could turn out to be an ogre? (5)
I believe the answer is:
rogue
'villain' is the definition.
(rogue is a kind of villain)
'turn out to be an ogre?' is the wordplay.
'turn' becomes 'uey' (Australian slang for a U-turn).
'out' means to remove the last letter.
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'be an ogre?' becomes 'rog' (I can't explain this - if you can you should give a lot more credence to this answer).
'uey' with its last letter taken off is 'ue'.
'ue' put after 'rog' is 'ROGUE'.
'who could' acts as a link.
Can you help me to learn more?
(Other definitions for rogue that I've seen before include "Baddie" , "Unprincipled man" , "Baddy" , "Miscreant" , "Wild animal living apart from herd, say elephant" .)