A club lead still does not do it. Assuming a normal auction to 4♥, Dealer's hand is fairly well known. When he wins the club with the 10, pulls trumps ending in dummy, and leads a diamond toward his hand, East should see a looming threat. If he ducks, Declarer is expected to have two club pitches for the remaining diamonds. This may allow two spades in the end, but never three. If East hops up, the diamonds come in for Declarer, allowing at least two spade pitches, so East should cash out and retire, in case of the actual layout. Further, the main point was to notice a hand where making six required finessing clubs both ways, working both ways. Hey, you said there were 3 other +480s and I was telling you how it happened... In real life when a diamond was played towards hand East either ducked without thinking or played declarer to have started with Kxx Kx Kxx AQxxx.