Rowing paddle (3)
I believe the answer is:
oar
'rowing paddle' is the definition.
'oar' can be an answer for 'paddle' (I've seen this in another clue). I also know that 'rowing' relates to this answer.
This is all the clue.
(Other definitions for oar that I've seen before include "One paddling" , "that may be feathered?" , "Propelling pole" , "Rower's paddle" , "Crewman" .)