Bear or swallow? (6)
I believe the answer is:
endure
This clue is a double definition.
'bear' is the first definition.
('endure' can be a synonym of 'bear')
'swallow?' is the second definition.
(thesaurus)
'or' acts as a link.
(Other definitions for endure that I've seen before include "Bear without giving up" , "Suffer or undergo" , "Put up with, say hardship" , "Persist over time" , "Bear something patiently" .)