Answer:

buttermilk

AnswerCrossword Clue
BUTTERMILKDale Evans' movie mount
BUTTERMILKBatter ingredient
BUTTERMILK"Ole ... Sky" (Hoagy Carmichael chart-topper)
BUTTERMILKDairy-case container
BUTTERMILKDale Evans' horse
BUTTERMILK"Old ... Sky"
BUTTERMILKDale Evans's steed
BUTTERMILKDale Evans's horse
BUTTERMILKIngredient in some pancake batter
BUTTERMILKDale Evans's horse on "The Roy Rogers Show"
BUTTERMILKGET RID OF MILDEW WITH...
BUTTERMILKPancake ingredient, perhaps
BUTTERMILKDairy product or Dale Evans' mount