Father also included a bear (5)
I believe the answer is:
panda
'a bear' is the definition.
'father also included' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'also' becomes 'and' (both can mean in addition).
'included' indicates putting letters inside.
'pa' placed around 'and' is 'PANDA'.
(Other definitions for panda that I've seen before include "Black-eyed animal" , "Chinese native" , "Chinese animal" , "Bamboo-eating mammal" , "Black and white animal" .)