Cryptic crossword clue
Where Marxists govern, right-winger’s brooding has such an effect 10

The most common and most likely answer to this crossword clue is the 10 letter word INCUBATORY

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "brooding has such an effect" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case brooding has such an effect = incubatory.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

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