Good-natured socialist family (7)
I believe the answer is:
kindred
'family' is the definition.
(thesaurus)
'good-natured socialist' is the wordplay.
'good-natured' becomes 'kind' ('kind' is associated in meaning with 'good-natured').
'socialist' becomes 'red' (red is a kind of socialist).
'kind'+'red'='KINDRED'
(Other definitions for kindred that I've seen before include "A ... spirit shares your feelings" , "Associated - relations" , "Relationship by blood" , "clan" , "These spirits have similar tastes" .)