Left-leaning Stalinist not quite right after revolution (9)

I believe the answer is:

sinistral

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'left' is the definition.
(thesaurus)

'stalinist not quite right after revolution' is the wordplay.
'not quite' means to remove the last letter (most but not all of the word).
'right' becomes 'r' (common abbreviation).
'after revolution' indicates anagramming the letters.
'stalinist' with its last letter taken off is 'stalinis'.
'stalinis'+'r'='stalinisr'
'stalinisr' with letters rearranged gives 'SINISTRAL'.

'leaning' is the link.
I am not very happy about this link. It may be part of another bit of the clue.

Can you help me to learn more?

(Another definition for sinistral that I've seen is " Turning to the left".)

I've seen this clue in The Guardian.

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