Catty old pontiff? (7)
I believe the answer is:
leonine
I believe this clue is a double definition.
'catty' is the first definition.
(like a lion, type of big cat)
'old pontiff?' is the second definition.
(Pope Leo)
(Other definitions for leonine that I've seen before include "Catty" , "Resembling a big cat" , "Like the king of the beasts" , "verse" , "Papal" .)