Royal tombs of ancient Egypt (8)
I believe the answer is:
pyramids
'royal tombs of ancient egypt' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pyramids that I've seen before include "I spy dram in Egyptian structures" , "Giant tombs of Egypt" , "Egyptian polyhedrons" , "Massive Egyptian memorials" , "in Africa?" .)