Answer:

donkey

Answer	Crossword Clue
DONKEY	Domesticated ass
DONKEY	Mule's cousin
DONKEY	Beast of burden

DONKEY	"... Kong" (early video game)
DONKEY	Party animal?
DONKEY	Democratic Party symbol
DONKEY	Braying beast
DONKEY	Party animal
DONKEY	Symbol of a party.
DONKEY	Friml's "Serenade."
DONKEY	Beast of burden.

DONKEY	Cartoonist's quadruped.
DONKEY	Rocky Mountain canary.
DONKEY	Type of engine.
DONKEY	Small switching engine.
DONKEY	Balky person
DONKEY	Tailless game animal
DONKEY	Emblem for Clinton
DONKEY	Political symbol

DONKEY	Mule's father
DONKEY	Braying animal
DONKEY	Elephant's opposite, symbolically
DONKEY	Shrek's sidekick
DONKEY	Eeyore, e.g.
DONKEY	"Pin the Tail on the ..." (Naughty By Nature)
DONKEY	Long-eared equid
DONKEY	Brayer

DONKEY	Party symbol since 1870