Docking fee (7)
I believe the answer is:
moorage
'docking fee' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for moorage that I've seen before include "Anchorage N or charge for using it!" , "The price for stopping" , "Fee for securing boat" , "Place to fasten" , "Charge for leaving boat" .)