Cyberbullies taunt leader over luxury car (6)

I believe the answer is:

trolls

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

'cyberbullies' is the definition.
I can't tell whether this definition defines the answer.

'taunt leader over luxury car' is the wordplay.
'leader' indicates taking the first letters.
'over' is a charade indicator (letters next to each other) (in a down clue, some letters go over others).
'luxury car' becomes 'Rolls' (Rolls Royce).
The first letter of 'taunt' is 't'.
't'+'rolls'='TROLLS'

Can you help me to learn more?

(Other definitions for trolls that I've seen before include "Ugly cave-dwelling creatures" , "Supernatural creatures of Scandinavian folklore" , "They start rows on the internet" , "cave-dwellers" , "Supernatural dwarfs or giants in Scandinavian myth" .)

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

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