State of some Byzantine palaces (5)
I believe the answer is:
nepal
'state' is the definition.
(Nepal is an example)
'some byzantine palaces' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'NEPAL' is hidden in the letters of 'byzantine palaces'.
'of' is the link.
(Other definitions for nepal that I've seen before include "Small country high in the Himalayas" , "Asian country -- plane (anag)" , "Himalayan kingdom" , "Asian country, capital Kathmandu" , "Hindu kingdom in south Asia" .)