Against the Welsh declarer West led
♣A followed by the queen. Nothing more to the play as South was able to set up the 5th club for a spade discard. At that table East bid only 3
♠ over 1NT, so declarer would likely also have made the slam on a non-club lead.
Neil Rosen from England was not that lucky. West led
♥7. Rosen now played for East to have the singleton
♣A (as suggested by echognome). Declarer drew trumps, cashed another heart and intended to duck a club to East. That would have worked if
♣A had been singleton because East would then have been endplayed to lead away from
♠K.
Very narrow target to aim at in my opinion, but it would indeed have been spectacular if that had been the layout.
On a heart lead you have to play the contract carefully even if you play for
♣A to be onside. You must win in hand, cash two top trumps ending in your hand and then lead a club up.
It wouldn't matter where you win the first heart if West rises with
♣A, but let's assume that he inserts the jack or queen. Now you must exit with a low club. If you wasted a heart honour from the dummy at trick 1, you are now one entry short to enjoy the 5th club. A competent declarer will foresee that and preserve the extra entry in dummy. Just like Josh Donn showed us.
An instructive deal.
Roland