Soft leather invigorates family (8)
I believe the answer is:
buckskin
'soft leather' is the definition.
'buckskin' can be an answer for 'leather' (buckskin is a kind of leather). I am not sure about the 'soft' bit.
'invigorates family' is the wordplay.
'invigorates' becomes 'bucks' (I can't justify this - if you can you should believe this answer much more).
'family' becomes 'kin' (synonyms).
'bucks'+'kin'='BUCKSKIN'
Can you help me to learn more?
(Other definitions for buckskin that I've seen before include "Type of leather" , "horse" , "Soft leather or wool fabric" , "Soft, yellowish suede leather" .)