The Prince of Darkness came back experienced (5)
I believe the answer is:
lived
'experienced' is the definition.
(living is a kind of experiencing)
'the prince of darkness came back' is the wordplay.
'the prince of darkness' becomes 'devil' ('Devil' can be a synonym of 'prince of darkness').
'came back' says the letters should be written backwards.
'devil' written backwards gives 'LIVED'.
(Other definitions for lived that I've seen before include "Escaped destruction" , "Existed or dwelt" .)