Knock back a cry of disapproval about University Road in town (10)

'knock back a cry' is the definition.
I know nothing about this answer so I can't judge whether this works.

'disapproval about university road in town' is the wordplay.
I cannot really understand how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is located in the answer.
'university' could be 'u' (abbreviation for university) and 'u' is found within the answer.
'road' could be 'rd' (abbreviation for road) and 'rd' is located in the answer.
'disapproval' could be 'boo' (as in a crowd booing) and 'boo' is present in the leftover letters.
This may be the basis of the clue (or it may be nonsense).

'of' is the link.

Can you help me to learn more?