Site includes a splendid residence (6)
I believe the answer is:
palace
'residence' is the definition.
(I know that palace is a type of residence)
'site includes a splendid' is the wordplay.
I cannot quite understand how this works, but
'a' is found in the answer.
'site' could be 'place' (synonyms) and 'place' is located in the leftover letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for palace that I've seen before include "Royal dwelling" , "See 16" , "Grand building" , "Royal house" , "very nice house" .)