Boxer or basset
I believe the answer is:
dog
I believe this is a double definition.
'boxer' is the first definition.
(I've seen this in other clues)
'basset' is the second definition.
(thesaurus)
(Other definitions for dog that I've seen before include "'Every . . . has its day'" , "Lassie" , "Shadow" , "Domesticated canine" , "Worry" .)