Premier's palace is opulent and richly luxurious (5)
I believe the answer is:
plush
'richly luxurious' is the definition.
(I've seen this in another clue)
'premier's palace is opulent' is the wordplay.
'premier's palace' becomes 'p' (I can't justify this - if you can you should believe this answer much more).
'is opulent' becomes 'lush' (I've seen this in another clue).
'p'+'lush'='PLUSH'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for plush that I've seen before include "Fabric; richly luxurious" , "Cut pile, softer than velvet" , "Fabric with a long velvety pile" , "Rich fabric" .)