Crossword Genius

An exclusive joint? (3)

Ross

I believe the answer is:

bar

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This clue could be a double definition.

'an exclusive' is the first definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'joint?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

Can you help me to learn more?

(Other definitions for bar that I've seen before include "Prevent; pub" , "Counter; prevent" , "Sandbank; drinking place" , "saving" , "Ingot" .)

I've seen this clue in the Evening Standard.
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