Frank makes a house a home (6)
I believe the answer is:
honest
'frank' is the definition.
(similar in meaning)
'a house a home' is the wordplay.
'a house' becomes 'ho' (abbreviation for house).
'a home' becomes 'nest' (a bird's home).
'ho'+'nest'='HONEST'
'makes' acts as a link.
(Other definitions for honest that I've seen before include "Free of deceit, truthful by nature" , "Free of deceit and lies - truly!" , "Objective mediator" , "Impartial intermediary" , "Genuine; fair" .)