Partner leads ♦J. When dummy comes down, it is void in diamonds, and contains zero high card points.
Dummy leads low trump. You follow, but dealer’s finesse works, no matter what you play.
Dealer leads a diamond, and trumps in the dummy. Not looking great right now, but you hold out hope.
Dealer once again finesses against your high club.
Rinse and repeat until dealer’s diamonds are established.
Dealer makes 7 clubs, doubled and redoubled!
Here’s the full layout: