Beastly kings have their pride! (5)
I believe the answer is:
lions
This might be a double definition.
'beastly kings' is the first definition.
(I've seen this before)
'pride' is the second definition.
(a pride is a group of lions)
'have their' acts as a link.
This may not be right. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for lions that I've seen before include "Nelson's column animals" , "Big cats" , "Animals in pride" , "Large carnivores" , "Kings of the jungle" .)