Posh homes dad does up (7)
I believe the answer is:
palaces
'posh homes' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe you can see a link between them that I can't see?
'dad does up' is the wordplay.
'dad' becomes 'pa' (both can mean one's father).
'does up' becomes 'laces' (I am not sure about this - if you are sure you should believe this answer much more).
'pa'+'laces'='PALACES'
Can you help me to learn more?
(Other definitions for palaces that I've seen before include "Royal residences" , "kings and queens here?" , "Offical residences of sovereigns" .)