Possible Clues:

• New variant almost developed into perfect state
• State of bliss recalled in revised version's reminiscences
• Buddhist blessed extinction
• That's the blessed state of the vehicle in the rain
• It's bliss to have rain around the middle of 21 across
• The way Ivan ran was sheer bliss
• How heavenly to have some rain around the truck!
• Buddhist state of perfect bliss
• Iran van (anag) - blissful state!
• For deliveries in the rain, that would be blissful