Fleece follower's family (9)
I believe the answer is:
sheepskin
'fleece' is the definition.
(I know that fleece can be written as sheepskin)
'follower's family' is the wordplay.
'follower's' becomes 'sheep's' (sheep can mean an unquestioning follower).
'family' becomes 'kin' (synonyms).
'sheeps'+'kin'='SHEEPSKIN'
(Other definitions for sheepskin that I've seen before include "Woolly pelt" , "Ovine outer layer used in coats and rugs" , "Body covering of an ovine mammal" , "Fleece garment" , "coat" .)