Crossword Genius

Charge about right for offensive online poster (5)

Ross

I believe the answer is:

troll

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

'poster' is the definition.
(I have seen 'Provocative poster' mean 'troll' so perhaps 'poster' could also mean 'troll')

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for troll that I've seen before include "Dwarf (or giant) of Norse myth" , "Fairytale monster" , "Scandinavian monster" , "Online pest" , "Dwarfish creature" .)

Want a hint initially instead of a full solution? Install my app