Rower's pair (4)
I believe the answer is:
oars
'rower's pair' 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" , "Sculls" , "Indirectly, they make waves" , "Propellers for small boat" , "Paddles" .)