Origin has sailor in flooded ground (6)
I believe the answer is:
seabed
'flooded ground' is the definition.
The answer and definition can be both natural objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'origin has sailor' is the wordplay.
'origin' becomes 'seed' (seed is a kind of origin).
'has' indicates putting letters inside.
'sailor' becomes 'ab' (abbreviation for able seaman).
'seed' going around 'ab' is 'SEABED'.
'in' is the link.
Can you help me to learn more?
(Other definitions for seabed that I've seen before include "Bottom of the ocean" , "marine base" , "Debase (anag)" , "Davy Jones's locker" , "The ocean floor, not for sleeping" .)