Bobbing on the waves (6)
I believe the answer is:
afloat
'bobbing on the waves' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for afloat that I've seen before include "At sea, on the water" , "Aboard ship" , "Resting on water" , "Borne on the water" , "At sea, drifting aimlessly" .)