millet wine
酏 centers on a type of alcoholic drink made from millet: a millet wine or sweet fermented beverage.
酏 combines 酉 (wine jar) with 也, which likely contributes a phonetic element. The character is associated with a type of millet wine.
The wine jar 酉 on the left holds a fermented drink, and the right side 也 suggests a container or vessel. Picture a jar full of millet wine.
For イ, imagine an eagle (イーグル) sipping millet wine from the jar: eagle -> イ, and the bird enjoys the sweet drink.