Tolerating being on one's feet (8)
I believe the answer is:
standing
I believe this clue is a double definition.
'tolerating' is the first definition.
('stand' can be a synonym of 'tolerate')
'on one's feet' is the second definition.
(I've seen this before)
'being' acts as a link.
(Other definitions for standing that I've seen before include "Social reputation" , "type of committee" , "one sort of committee?" , "(Of corn) not yet reaped" , "Prestige" .)