Crossword Genius

Charge for ring (4)

Ross

I believe the answer is:

I believe this is a double definition.

'charge' is the first definition.
(toll is a kind of charge)

'ring' is the second definition.
(tolling is a kind of ringing)

'for' is the link.

(Other definitions for toll that I've seen before include "Charge (to use road)", "Fee for road/bridge", "Crossing fee", "repeated ringing", "Form of road tax".)

I've seen this clue in The Telegraph.