This deal is from the online MCBA league.
South played four hearts after East had overcalled two diamonds during the auction.
East's overcall got West off to the good lead of a diamond which took an entry from dummy to reach the spade suit when set up.
Declarer started on spades, West held up for one round when East showed an odd number and took the ace on the second round.
West continued with diamonds. South ruffed and tried the queen of hearts from hand to get an entry to dummy.
East should duck this. This is known as a gambit play, it costs a trick in hearts, but gains overall as South now has to lose three club tricks.
In practice East fell from grace by winning the heart. He then tried to cash two club tricks, but declarer won the second club, crossed to the jack of hearts and discarded his losing club on the good spade.
To make the hand declarer has to draw trumps at trick two and then get to dummy with a spade and play a club to the king. (Playing clubs first and then drawing trumps later also works).
Thanks to Phillip Taylor for reporting this deal