Resident at home with partner (6)
I believe the answer is:
inmate
'resident' is the definition.
(I know that inmate is a type of resident)
'home with partner' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'with' means one lot of letters go next to another.
'partner' becomes 'mate' (synonyms).
'in'+'mate'='INMATE'
'at' acts as a link.
(Other definitions for inmate that I've seen before include "Inhabitant of prison or other institution" , "Someone confined, eg to hospital or prison" , "One held in prison" , "Convict" , "Institution resident" .)