Stomach consuming large surfeit (4)
I believe the answer is:
glut
'surfeit' is the definition.
('glut' can be a synonym of 'surfeit')
'stomach consuming large' is the wordplay.
'stomach' becomes 'gut' (I've seen this before).
'consuming' indicates putting letters inside.
'large' becomes 'l'.
'gut' going around 'l' is 'GLUT'.
(Other definitions for glut that I've seen before include "An excessive supply or surfeit" , "Surfeit or over-supply" , "Excessive abundance" , "Flood" , "Satiate" .)