Relating to a low point in the main? (4-3)
I believe the answer is:
deep sea
'relating to a low point in the main?' is the definition.
(the main is an old name for the sea)
'a low point in the main?' is the wordplay.
I cannot really understand how this works, but
'a' is present in the answer.
'low' could be 'deep' (similar in meaning) and 'deep' is located in the answer.
'point' could be 'se' (SE is an example) and 'se' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for deep sea that I've seen before include "lantern fish's habitat" , "Found in much water" , "type of fisherman" , "distant waters" , "What's beyond a continental shelf" .)