Communication by car? (5)
I believe the answer is:
cable
'car?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'communication by' is the wordplay.
'communication' becomes 'c' (C is an example).
'by' becomes 'able' (I can't explain this - if you can you should give a lot more credence to this answer).
'c'+'able'='CABLE'
Can you help me to learn more?
(Other definitions for cable that I've seen before include "Anchor chain; type of TV" , "Wire; message" , "Heavy chain or rope" , "Strong rope made of twisted strands of hemp, nylon or steel wire" , "Liberal Democrat" .)