Third Answer
Against three spades, you led 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:

Now what: a trump, a heart, the Ace of diamonds, or the nine of clubs? It looks like partner has the AJ of clubs and the KJ of diamonds (9 HCP). Partner’s remaining 6-8 HCP will be in the major suits, so unless partner (1) is minimum and (2) has both the King and Queen of hearts, partner will have a top spade. Lead either of your trumps, reducing dummy’s ability to ruff hearts.
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