Bridge fare (4)
I believe the answer is:
toll
'bridge fare' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for toll that I've seen before include "Tax for using a service" , "Loss, damage; ring (bell)" , "Fee for the use of a road or bridge" , "Charge (to use road)" , "Ring bell slowly as for funeral" .)