You are South. Dummy is East.
Partner picks out the unusual lead of the king of clubs.
The play goes:
CK, low, low, declarer's Ace
Ace of hearts (all follow, partner with the 5 and dummy with the 3)
Spade towards dummy, on which partner goes up with the ace
10 of clubs, declarer gives it a look, Jack, Queen, low
Low club, 9, ruff with the 6, club
Ace of diamonds (you encourage, for what it's worth)
Low diamond to your king.
You have 5 tricks. Where is the 6th one coming from?
1♥ P 1♠ P
2♥ P P P