eg Cleopatra's Needle (7)
I believe the answer is:
obelisk
'eg cleopatra's needle' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for obelisk that I've seen before include "Cleopatra's Needle, for example" , "Tapering square pillar" , "Needle-like column" , "Tapering pillar erected as monument" , "Tall tapering pillar as monument or landmark" .)