Rocky road to home rule (6)
I believe the answer is:
ordain
'rule' is the definition.
(I've seen this before)
'rocky road to home' is the wordplay.
'rocky' indicates an anagram.
'to home' becomes 'in' ('he's home' can mean 'he's in').
'road' with letters rearranged gives 'orda'.
'orda'+'in'='ORDAIN'
(Other definitions for ordain that I've seen before include "Appoint - admit to holy orders" , "Install as priest" , "Inroad (anag.)" , "Rule" , "Establish" .)