Stomach holding large surplus (4)
I believe the answer is:
glut
'surplus' is the definition.
(I've seen this before)
'stomach holding large' is the wordplay.
'stomach' becomes 'gut' (I've seen this before).
'holding' indicates putting letters inside.
'large' becomes 'l'.
'gut' enclosing 'l' is 'GLUT'.
(Other definitions for glut that I've seen before include "Excessively abundant supply" , "Surfeit as of crop" , "Excessive abundance" , "An excessive supply or surfeit" , "A surplus or excess" .)