Aromatic ammonia spirit is a kind of medicinal solution.
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The 'fine wine' sense of 醑 is literary and old. Its only living use is the pharmacy term 醑剂 (a spirit / alcoholic solution), a borrowed translation sense, not everyday vocabulary.
The 酉 radical pictures a wine jar and marks fermentation and alcohol words. It gives 醑 its 'wine / spirit' meaning, the same radical as 酒 wine and 醉 drunk.
Right side 胥 is the sound element; the reading shifted from xū to xǔ. It carries no meaning here and works purely as the phonetic tag for this wine word.