I can't see making this against competent defense. I'll win the ♣ ace (spade pitch), and try 10♥, ♥ and heart. If these live, play a 4th heart pitching a spade. if somehow RHO can be persuaded to ruff this from 4=3=2=4 and AT of diamonds, he lets this in.
Note - even this doesnt work. LHO pitches a club on the 3rd diamond and eventually gets his 8xx promoted.