Russian port on the Kama River known as Molotov between 1940 and 1962 (4)

I believe the answer is:

perm

(Other definitions for perm that I've seen before include "A hairdo; Urals city" , "Russian port; hairstyle" , "Football pools forecast - wavy hairdo" , "Hair setting treatment; pools selection system" , "Hairstyle treatment" .)

I've seen this clue in The Independent.

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