Bore, extremely unpopular, stopped outside (7)
I believe the answer is:
endured
'bore' is the definition.
('endure' can be a synonym of 'bear')
'extremely unpopular stopped outside' is the wordplay.
'extremely' means to remove the middle letters.
'stopped' becomes 'ended' ('end' can be a synonym of 'stop').
'outside' means one lot of letters goes inside another.
'unpopular' with its centre removed is 'ur'.
'ur' inserted inside 'ended' is 'ENDURED'.
(Other definitions for endured that I've seen before include "Bore; put up with" , "Put up with something" , "Red nude (anag.)" , "Withstood" , "Borne" .)