Preheat oven to 375°F; butter a 9x9-inch dish.
Toss apricots, 3/4 cup sugar, cornstarch, and lemon juice in a large bowl; transfer to dish.
Whisk flour, 1/3 cup sugar, baking powder, and salt in a medium bowl; cut in butter to coarse meal.
Stir in buttermilk and almond extract just until dough comes together.
Drop large spoonfuls over fruit, slightly spaced apart; sprinkle with coarse sugar.
Bake 35-40 minutes until topping is golden and fruit bubbles at edges.
Cool at least 15 minutes to thicken juices slightly; serve.