Hearing about brother originally in the family (6)
I believe the answer is:
tribal
'family' is the definition.
(both can mean relating to one's family)
'hearing about brother originally' is the wordplay.
'hearing' becomes 'trial' (as in a court case).
'about' indicates putting letters inside.
'originally' suggests taking the first letters.
The initial letter of 'brother' is 'b'.
'trial' going around 'b' is 'TRIBAL'.
'in the' acts as a link.
(Other definitions for tribal that I've seen before include "Ethnic, sectional" , "Of a group of people related by blood" , "Relating to clan" , "family" , "Relating to people related by blood" .)