Since you have control with trumps in both hands, you can afford to play clubs with no risk. You lead the King of Clubs. Flanker plays the seven, you play the two from dummy, and jammer wins with the Ace. He plays back a small club. You play the eight, flanker the Jack, and dummy the Queen. Now you play the third club from dummy, jammer plays the ten, you ruff and flanker discards a diamond. So, flanker began this deal with three spades, seven diamonds and two clubs, leaving her only one card in hearts. Jammer originally held one spade, six hearts, no diamonds and six clubs. Armed with that information, you now have the hand locked down. You play the Jack of Hearts. If flanker plays a small card, you win with dummy's King and finesse the ten on the way back to your hand. This is a finesse that cannot lose. You end up with five spade tricks, three heart tricks, one club trick and the Ace of Diamonds, just making 4 Spades.