Hide from Billy’s family? (8)
I believe the answer is:
goatskin
'hide' is the definition.
(I know that goatskin is a type of hide)
'billy's family?' is the wordplay.
'billy's' becomes 'goat's'.
'family?' becomes 'kin' ('kin' can be a synonym of 'family').
'goats'+'kin'='GOATSKIN'
'from' is the link.
(Other definitions for goatskin that I've seen before include "Leather from nanny or billy?" , "Billy's hide?" , "Hide Billy or Nanny" , "Leather - wine holder of old" , "Type of leather - a song kit (anag)" .)