This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 夒 is uncertain. It appears to be an ancient character, possibly related to a monkey or a mythological figure, but its component origins are not clearly established.
The character looks like a complex figure with a head (頁) and limbs (止, 巳). Without a known meaning, you might imagine a mysterious ancient creature.
For ドウ, imagine a deep, resonant drum sound: 'dou' echoes as you look at this mysterious kanji. Dou -> ドウ.