Go on stomach (6)
I believe the answer is:
endure
I believe this is a double definition.
'go on' is the first definition.
(enduring is a kind of going on)
'stomach' is the second definition.
(synonyms)
(Other definitions for endure that I've seen before include "Put up with - last" , "Stand" , "Put up with or withstand" , "Bear without giving up" , "Bear something patiently" .)