Revolutionary material, regularly reordered (5)

I believe the answer is:

lenin

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'revolutionary' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for lenin that I've seen before include "Marxist theoretician" , "Vladimir Ilich Ulyanov" , "First leader of USSR" , "Vladimir Ilyich -, Soviet premier" , "Leader of the Russian Revolution" .)

I've seen this clue in The Sunday Times and The Times.

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