Witch gets a right horrible fellow (5)

I believe the answer is:

hagar

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

'horrible fellow' is the definition.
I know nothing about this answer so I can't judge whether this works.

'witch gets a right' is the wordplay.
'witch' becomes 'hag' (synonyms).
'gets' means one lot of letters go next to another.
'a right' becomes 'ar' (I've seen this in other clues).
'hag'+'ar'='HAGAR'

Can you help me to learn more?

(Another definition for hagar that I've seen is " Ishmael's mother".)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.