Well, it does sound like cramberries.
There’s no magic to crisps; combine the filling, top with the combined topping, and bake at 375 deg. for about an hour, or until the top is crisp and it’s bubbling around the edges.
From a box sold in Martinez, California.
Apple Cranberry Crisp
3 c. cranberries
2 apples, sliced
1-1/2 c. sugar
1 T. flour
Topping
3/4 c. oats
1/2-1/4 c. brown sugar
1 c. nuts
1 Tbsp. flour
3 Tbsp. butter