Reputable university’s predicament — radicals primarily toppling Left (7)
I believe the answer is:
upright
'reputable' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for upright that I've seen before include "beyond reproach" , "Sort of piano" , "Type of piano" , "deserving respect" , "extremely reliable?" .)