Short light oar (6)
I believe the answer is:
paddle
'short light oar' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for paddle that I've seen before include "Manual propeller for canoe" , "Walk by the shore" , "Small oar to propel canoe" , "Wade in water" , "Oar; walk in water" .)