Second Answer
Against three spades, you lead the ten of clubs (seven, six, Queen). You placed declarer with 6-8 HCP and concluded that partner was encouraging in clubs. Declarer plays the four of hearts (two, Ace, six). Now the deuce of diamonds from dummy (five, nine and you win the ten). This position remains:
What now; a trump, a heart, the Ace of diamonds, or the nine of clubs?