Rope-winding device (7)
I believe the answer is:
capstan
'rope-winding device' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for capstan that I've seen before include "Dockside rope winder" , "Winding mechanism" , "Rope-winding cylinder" , "Machine for hauling in ropes" , "Turner" .)