Location accommodating a royal residence (6)
I believe the answer is:
palace
'royal residence' is the definition.
(I've seen this before)
'location accommodating a' is the wordplay.
'location' becomes 'place' (a location is a place).
'accommodating' indicates putting letters inside.
'place' enclosing 'a' is 'PALACE'.
(Other definitions for palace that I've seen before include "Sovereign's residence" , "Royal building" , "eg Buckingham" , "See 10" , "Royal mansion" .)