Locale (4)
(Other definitions for area that I've seen before include "Expanse or neighbourhood" , "Length multiplied by breadth" , "field of study" , "Surface measurement" , "topic" .)
'locale' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for site that I've seen before include "Situation (of a building)" , "Area set aside for building" , "Somewhere to build, perhaps" , "Position for the building sounds visual" , "Where something is located" .)