Ok, if LHO who's short in trumps ruffs the third
♣, then you should have tried to pull trumps and claim

Otherwise you can try to cater for a 4-1 trump break and hopefully find a line that also works with some other 3-2 breaks as well.
So let's say you start with one high trump and a
♥ ruff, then run
♣. If
♣ are 3-3, play a 4th round pitching the last
♦ from dummy regardless of who ruffs.
If LHO has two trumps, he will/should be the one ruffing. Now you ruff the forced
♥ return and play the last
♣ pitching dummy's
♥. Now RHO can ruff this. But he has only one more trump left, so you can ruff his
♦ return and claim. This is the lay-out:
If LHO has a stiff trump, RHO ruffs and returns a trump. You win, ruff a
♥ and play the last
♣ pitching a
♥ and RHO has to use his last trump. This is the lay-out:
It might appear as though you need to/can ruff all of dummy's
♥s to make the hand, so if you start with two
♥s, it's too late when trumps are 4-1. You do need to ruff 2
♥s, but not necessarily the last one, as long as you can use your
♣s as trump-substitutes and you can't do that if you ruff more than one
♥ before running
♣s.
The other neat thing about the hand is that once
♣s are 3-3, you don't care who ruffs the next two rounds of
♣s, as that'll exhaust two enemy trumps and you can pull the last trump when you get back in.
Seeking input from anyone who doesn't frequently "wtp", "Lol" or post to merely "Agree with ..."