Covered up by Yuppie Disease on part of The Square (4)
I believe the answer is:
side
'the square' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'covered up by yuppie disease on part' is the wordplay.
'covered up by yuppie disease' becomes 'de' (I can't justify this - if you can you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other).
'part' becomes 'si' (si is a kind of part).
'de' put after 'si' is 'SIDE'.
'of' is the link.
Can you help me to learn more?
(Other definitions for side that I've seen before include "Aspect, sports team" , "[MAN U], perhaps" , "Wolves, say" , "Particular aspect" , "Accompanying" .)