Where a duck swims (4)
I believe the answer is:
pond
(Other definitions for pond that I've seen before include "Small area of still water" , "Small body of water" , "Small lake" , "Possible site for weed" , "Himalayan country" .)
I believe the answer is:
pond
(Other definitions for pond that I've seen before include "Small area of still water" , "Small body of water" , "Small lake" , "Possible site for weed" , "Himalayan country" .)