Turnpike payment (4)
I believe the answer is:
toll
'turnpike payment' 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 "number of dead?" , "Spout" , "Charge to use bridge/road" , "Payment for passage - ring bell!" , "Fee for the use of a road or bridge" .)