The shot showing the old interior is very sad (7)
I believe the answer is:
tragedy
'the shot' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'the old interior is very sad' is the wordplay.
'the old' becomes 'aged' (I've seen this before).
'interior' indicates putting letters inside.
'is very sad' becomes 'try' (I can't explain this - if you can you should give a lot more credence to this answer).
'aged' going within 'try' is 'TRAGEDY'.
'showing' is the link.
Can you help me to learn more?
(Other definitions for tragedy that I've seen before include "Play with a gloomy finish" , "Terribly sad thing" , "Such a story ends unhappily" , "Calamitous happening, great misfortune" , "play by Aeschylus?" .)