Dinghy movers (4)
I believe the answer is:
oars
'dinghy movers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oars that I've seen before include "These could make you row" , "Busy bodies usually stick them in, also used in rowing" , "Al --, US gangster" , "Paddles" , "Manual boat propellers" .)