Positioned the box (3)
I believe the answer is:
set
This could be a double definition.
'positioned' is the first definition.
(thesaurus)
'the box' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for set that I've seen before include "Fix in place; similar group" , "Create a puzzle" , "Gel; group" , "Group; unchanging" , "Group of items of the same kind" .)