Suite (3)
(Other definitions for plaza that I've seen before include "Public square for pedestrians" , "The ____ Mayor is important in Madrid" , "Sp. square, market-place" , "Town square (Sp.)" , "Public square, as in Spanish town" .)
'suite' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for set that I've seen before include "Group; hard" , "Ready" , "Group of items of the same kind" , "become firm" , "Scenery etc. for a drama" .)