Ship's track (4)
I believe the answer is:
wake
(Other definitions for wake that I've seen before include "Come to - track of boat" , "Track (of ship) in water" , "Disturbance behind ship" , "Aftermath" , "Ship's wash" .)
I believe the answer is:
wake
(Other definitions for wake that I've seen before include "Come to - track of boat" , "Track (of ship) in water" , "Disturbance behind ship" , "Aftermath" , "Ship's wash" .)