A set form of home entertainment (3,3)
I believe the answer is:
the box
This clue could be a double definition.
'a set form' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'home entertainment' 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?
'of' is the link.
Can you help me to learn more?
(Another definition for the box that I've seen is " TV (sl.)".)