Richly furnished residences in buildings around America (7)
I believe the answer is:
palaces
'richly furnished residences' is the definition.
'palaces' can be an answer for 'residences' (palace is a kind of residence). I am unsure of the 'richly furnished' bit.
'buildings around america' is the wordplay.
'buildings' becomes 'spas' (spa is a kind of building).
'around' means to look at the middle letters.
'america' becomes 'laces' (I can't explain this - if you can you should give a lot more credence to this answer).
The middle of 'spas' is 'pa'.
'pa'+'laces'='PALACES'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for palaces that I've seen before include "Offical residences of sovereigns" , "Royal residences" , "kings and queens here?" .)