Flooded land next to lake, people opposed (8)
I believe the answer is:
atlantis
'flooded land' is the definition.
The definition suggests a singular noun which matches the answer.
'next to lake people opposed' is the wordplay.
I cannot quite see how this works, but
'lake' could be 'l' (geographical abbreviation) and 'l' is present in the answer.
'opposed' could be 'anti' (similar in meaning) and 'anti' is found within the answer.
The remaining letters 'ats' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for atlantis that I've seen before include "Lost island covered by the sea" , "Mythical lost city" , "Mysterious continent" , "In Greek legend, beautiful island submerged in the sea" , "Place of legend" .)