Controversial writers in Eastern European fogs (9)

I believe the answer is:

polemists

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

'controversial writers' is the definition.
The definition suggests a plural noun which matches the answer.

'eastern european fogs' is the wordplay.
'eastern european' becomes 'Pole'.
'fogs' becomes 'mists' ('mist' can be a synonym of 'fog').
'pole'+'mists'='POLEMISTS'

'in' acts as a link.

Can you help me to learn more?

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

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