Problem contributor to blog, first of trolls to be suspended (5)
I believe the answer is:
poser
'problem' is the definition.
(I know that poser is a type of problem)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for poser that I've seen before include "one who has airs and graces" , "Tricky clue" , "Artist's model" , "subject for an artist?" , "Problem set by the model" .)