Shoulder or stomach (4)
I believe the answer is:
bear
This clue is a double definition.
'shoulder' is the first definition.
(I've seen this in another clue)
'stomach' is the second definition.
(both can mean to tolerate or endure)
'or' is the link.
(Other definitions for bear that I've seen before include "Heavy carnivorous quadruped" , "Beast - tolerate" , "Falling market for large furry animal" , "Harbour - transport" , "Support; wild animal" .)