Nameless Russian leader's about to delay retirement (3,2)
I believe the answer is:
sit up
'delay retirement' is the definition.
(sitting up instead of retiring to bed)
I can't explain the rest of the clue.
(Other definitions for sit up that I've seen before include "form of exercise" , "Adopt erect sedentary posture" , "Means to deal with corporation, maybe" , "Become suddenly alert" , "physical exercise" .)