Upright house and home (6)
I believe the answer is:
honest
'upright' is the definition.
(upright can mean honest or moral)
'house and home' is the wordplay.
'house' becomes 'ho' (abbreviation for house).
'and' says to put letters next to each other.
'home' becomes 'nest' (a bird's home).
'ho'+'nest'='HONEST'
(Other definitions for honest that I've seen before include "Not cheating, just" , "Uncorrupt - open - genuine" , "Truthful and trustworthy" , "Truthful and dependable" , "Upright and fair" .)