Richard III's house (4)
I believe the answer is:
york
'richard iii's house' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for york that I've seen before include "Dismiss" , "fifteenth century house" , "Royal house in the Wars of the Roses" , "Northern walled city" , "Eboracum (L)" .)