This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 醔 is uncertain. It visually combines 秋 (autumn) and 酉 (sake jar), but the original semantic or phonetic motivation is unclear.
With 秋 (autumn) over 酉 (sake jar), imagine autumn sake brewing, but the kanji's meaning is obscure.
For シュウ, imagine the autumn (秋, しゅう) sake jar (酉) being opened: 秋 -> シュウ, and the sound of the jar opening is シュウ.