By all conclusions Barbary ape amongst safari park's hairy beasts? (5)
I believe the answer is:
yetis
'hairy beasts?' is the definition.
(yetis are hairy creatures)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for yetis that I've seen before include "Rarely seen group of creatures" , "fantastic beasts" , "Beasts that aren't real" , "More than one mythic creature" , "Abominable snowmen" .)