I'll give this a try, pls do not crucifix me if I got that wrong (it will happen again

).
Main problem occurs when RHO has Jxxx.
I think it is still right to draw trumps and start with AQ of clubs.
When LHO shows out at 2nd round, I play off all my winners, discarding diamond in dummy, and finally play a diamond hoping that RHO's 3rd card (besides
♦Jx) is Diamond Ace and the throw in succeeds:
diamonds honors are probably split, or RHO has both (maybe he did not double 5D for the lead becauise he has not enough length in D) otherwise LHO is likely to lead A of diamonds;
Also, there are a little more chances for RHO to hold Ace than K since many players, of all levels, like to lead an Ace vs a slam (not only beginners- see Easley Blackwood book on opening leads where he states, with many examples from international play, that many more slam are made for NOT leading an unsupported A rather than those which are made because of an A lead).
So there is a little more than 50% chance that RHO's last 3 cards are Jx in clubs and A of diamonds, in which case the squeeze succeeds.
Combining this chance with the probability of clubs breaking 3-2 or west holding Jxxx, it seems to me a reasonable line ?
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Uh-oh, just noticed RHO can unblock discvartding Diamond Ace...
I'll have to think more...
"Bridge is like dance: technique's important but what really matters is not to step on partner's feet !"
West North East South
- - - 1♠
Pass 3♠ Pass 4NT
Pass 5♦ Pass 5♠
Pass 6♠ Pass Pass
Pass