Stubborn beast (4)
'stubborn beast' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mule that I've seen before include "Obstinate quadruped" , "Proverbially stubborn beast" , "Offspring of a donkey and a mare" , "Hybrid animal - slipper" , "The animal said to be stubborn" .)
'stubborn beast' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ass that I've seen before include "Wally" , "Hardy and sure-footed animal" , "mug" , "Horse relative" , "Dolt" .)