Tickets required for unsold newspapers (7)
I believe the answer is:
returns
This could be a double definition.
'tickets' is the first definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe you can see a link between them that I don't see?
'unsold newspapers' is the second definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe you can see an association between them that I don't see?
'required for' acts as a link.
Can you help me to learn more?
(Other definitions for returns that I've seen before include "proceeds" , "Sends back" , "Hands back" , "Goods sent back" , "Profits" .)