Crossword Genius

Ring bell on counter where travellers pay (4,3)

Ross

I believe the answer is:

toll bar

I'm a little stuck... Click here to teach me more about this clue!

'travellers pay' is the definition.
The definition suggests a singular noun which matches the answer.

'ring bell on counter' is the wordplay.
I cannot quite understand how this works, but
'ring' could be 'toll' (ring a bell) and 'toll' is located in the answer.
'counter' could be 'bar' (bar is a kind of counter) and 'bar' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'where' is the link.

Can you help me to learn more?

(Another definition for toll bar that I've seen is " roadblock?".)

I've seen this clue in The Globe and Mail.
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