It allows you to exhibit just how house-proud you are! (5,4)
I believe the answer is:
ideal home
'it allows you to exhibit just' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'house-proud you are' is the wordplay.
I cannot quite understand how this works, but
'house' could be 'home' (homing is a kind of housing) and 'home' is present in the answer.
'are' could be 'a' (short for 'are', historical unit of measurement) and 'a' is found in the answer.
This explanation may well be incorrect...
'how' is the link.
Can you help me to learn more?
I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution?
Install my app