Fiendish participant in rude villainy (5)

I believe the answer is:
devil
'fiendish participant' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'in rude villainy' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DEVIL' is hidden in the letters of 'rude villainy'.
Can you help me to learn more?
(Other definitions for devil that I've seen before include "See 11" , "Imp" , "Fiend" , "Demon" , "Powerful evil spirit" .)
