Polish revolt about introduction of Leninism (7)

I believe the answer is:

slicken

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'polish' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'revolt about introduction of leninism' is the wordplay.
'revolt' becomes 'sicken' (sickening is a kind of revolting).
'about' indicates putting letters inside.
'introduction of leninism' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'sicken' placed around 'l' is 'SLICKEN'.

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I've seen this clue in The Independent.

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