Drug mule's relative? (5)
I believe the answer is:
horse
This might be a double definition.
'drug' is the first definition.
(horse is a kind of drug)
'mule's relative?' is the second definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for horse that I've seen before include "Nag, hack" , "Mount" , "Cavalry - gymnastic apparatus" , "Animal featuring in the sport of kings" , "Eg, mare" .)