Location of object in the south-east (4)
I believe the answer is:
site
'location' is the definition.
(site is a kind of location)
'object in the south-east' is the wordplay.
'object' becomes 'it' (pronoun for an inanimate object).
'in the' indicates putting letters inside.
'south east' becomes 'SE' (abbreviation).
'it' put within 'se' is 'SITE'.
'of' acts as a link.
(Other definitions for site that I've seen before include "Where something is located" , "Situation (of a building)" , "Locate - place" , "Locate, position" , "Locale" .)