Stomach, midriff (7)
I believe the answer is:
abdomen
This clue is a double definition.
'stomach' is the first definition.
(synonyms)
'midriff' is the second definition.
(I've seen this before)
(Other definitions for abdomen that I've seen before include "gut" , "Tummy" , "A main part of the body" , "Insect's body part" , "Mean bod (anag.)" .)