Pet pugilist? (5)
I believe the answer is:
boxer
I believe this is a double definition.
'pet' is the first definition.
(I know that Boxer is a dog breed)
'pugilist?' is the second definition.
(I know that pugilist can be written as Boxer)
(Other definitions for boxer that I've seen before include "Pug - dog" , "Dog - fighter" , "Prizefighter" , "Pugilist - dog" , "one that's accustomed to fighting" .)