Rolling under eastern bear (6)
I believe the answer is:
endure
'bear' is the definition.
(both can mean to tolerate)
'rolling under eastern' is the wordplay.
'rolling' is an anagram indicator.
'eastern' becomes 'e'.
'under' is an anagram of 'endur'.
'endur'+'e'='ENDURE'
(Other definitions for endure that I've seen before include "Bear, stick it out" , "Tolerate, put up with" , "Last or bear with courage" , "Put up with something" , "'Last, bear (6)'" .)