House completed but not bought (4-4)
I believe the answer is:
home-made
'not bought' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives can sometimes define each other.
'house completed' is the wordplay.
'house' becomes 'home' (homing is a kind of housing).
'completed' becomes 'made' (I am not sure about this - if you are sure you should believe this answer much more).
'home'+'made'='HOME-MADE'
'but' acts as a link.
Can you help me to learn more?
(Another definition for home-made that I've seen is " Produced on the premises".)