Horribly evil! (4)

I believe the answer is:

vile

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

'horribly evil' is the definition.
'vile' can be an answer for 'evil' (thesaurus). I am not sure about the 'horribly' bit.

'horribly evil' is the wordplay.
'horribly' indicates an anagram.
'evil' anagrammed gives 'VILE'.

Can you help me to learn more?

(Other definitions for vile that I've seen before include "Base" , "Revolting" , "Book by Evelyn Waugh" , "Depraved" , "Horrible" .)

I've seen this clue in The Times.

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