IMPs. You play in 4♥. You dealt and the opponents were silent.
Opening lead is the ♦4, 2 and a fast 6 from RHO which you win.
Rightly or wrongly, you lead a spade up, LHO grabs the Ace and exits the 7. RHO plays the 4 and 2 (udca).
(edit - not sure what happened but your spade holding is the 10-5.)
Now what.

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