Home rule for a sort of relation (2-3)
I believe the answer is:
in-law
'a sort of relation' is the definition.
(I know that in-law is a type of family member)
'home rule' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'rule' becomes 'law' (law is a kind of rule).
'in'+'law'='IN-LAW'
'for' is the link.
(Other definitions for in-law that I've seen before include "Relation by marriage" , "Meghan to Harry's family?" , "Relative by marriage" , "Near relative" , "Spouse's relation" .)