At home, fed entertaining young animal in brood (8)
I believe the answer is:
incubate
'brood' is the definition.
(I know that brood can be written as incubate)
'at home fed entertaining young animal' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'fed' becomes 'ate' ('eat' can be a synonym of 'feed').
'entertaining' is an insertion indicator.
'young animal' becomes 'cub' (eg a young bear).
'in'+'ate'='inate'
'inate' going around 'cub' is 'INCUBATE'.
'in' acts as a link.
(Other definitions for incubate that I've seen before include "Develop under favourable conditions, bacteria say" , "Brood" , "Hatch eggs by warmth of bird's body" , "Sit on (an egg)" , "Keep (eggs) warm" .)