You are East, the declarer in 6♠. South leads a heart.
Spades break 2-1. Do you have a 'lock'?
Scroll down for the full hand, a suggestion/solution and/or explanation
The Entire Deal
Gino's Suggestion
You have a lock. Eliminate clubs (4 rounds) and hearts (3 rounds) by ruffing. In trick 10 finesse in diamonds. North wins and is endplayed.