A line for a takeaway? (5,4)
I believe the answer is:
minus sign
This clue could be a double definition.
'a line' is the first definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'takeaway?' is the second definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?
'for a' acts as a link.
Can you help me to learn more?
(Other definitions for minus sign that I've seen before include "Maths operator" , "indication of negativity?" , "indicating deduction!" , "Symbol indicating subtraction" , "Subtraction indicator" .)