So be it about odd bod or lower part of bod (7)
I believe the answer is:
abdomen
'lower part of bod' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'so be it about odd bod' is the wordplay.
'so be it' becomes 'amen' (I've seen this in another clue).
'about' indicates putting letters inside.
'odd' indicates an anagram.
'bod' is an anagram of 'bdo'.
'amen' going around 'bdo' is 'ABDOMEN'.
'or' is the link.
Can you help me to learn more?
(Other definitions for abdomen that I've seen before include "Part of body containing the digestive organs" , "Part of body containing the stomach" , "Mean bod (anag.)" , "A main part of the body" , "guts" .)