Tolerates biased rambling (6)
I believe the answer is:
abides
'tolerates' is the definition.
('abide' can be a synonym of 'tolerate')
'biased rambling' is the wordplay.
'rambling' indicates anagramming the letters.
'biased' is an anagram of 'ABIDES'.
(Other definitions for abides that I've seen before include "Lives or endures" , "Stays" , "Acts in accordance with rules" , "Dwells (archaic)" , "survives" .)