Galley implements (4)
I believe the answer is:
oars
'galley implements' 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 "Implements to propel or steer on water" , "Soar with propellors" , "Indirectly, they make waves" , "Henley sportsmen" , "Boating implements" .)