Tolerate attitude (5)
I believe the answer is:
stand
I believe this clue is a double definition.
'tolerate' is the first definition.
(synonyms)
'attitude' is the second definition.
(stand is a kind of attitude)
(Other definitions for stand that I've seen before include "Hold good < area for spectators < put up with" , "remain in force" , "Raised platform; tolerate" , "Assume an upright position" , "group of trees" .)