Pal exorcising right devil (5)

I believe the answer is:

fiend

I'm a little stuck... Click here to teach me more about this clue!

'devil' is the definition.
(I know that devil can be written as fiend)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for fiend that I've seen before include "Demon; cruel person" , "Devilish person" , "Demon, ogre" , "monster" , "Wicked and inhuman person" .)

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