Posts deliberately inflammatory messages online about ugly creatures (6)
I believe the answer is:
trolls
'creatures' is the definition.
'posts deliberately inflammatory messages online about ugly' is the wordplay.
I cannot really understand how this works, but
'messages' could be 'rolls' (roll is a kind of message) and 'rolls' is found within the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for trolls that I've seen before include "Mythical Scandinavian dwarfs" , "Ugly cave-dwelling creatures" , "Mythic Scandinavian creatures" , "Mythical Scandinavian cave dwellers" , "internet pests" .)