Student of Red Guard corruption around end of Revolution (9)
I believe the answer is:
undergrad
'student' is the definition.
(undergrad is a kind of student)
'red guard corruption around end of revolution' is the wordplay.
'corruption' is an anagram indicator.
'around' indicates putting letters inside.
'end of' says to take the final letters.
The final letter of 'revolution' is 'n'.
'red'+'guard'='redguard'
'redguard' anagrammed gives 'udergrad'.
'udergrad' placed around 'n' is 'UNDERGRAD'.
'of' acts as a link.
(Another definition for undergrad that I've seen is " Learner".)